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1

Patel, J. A., B. D. Mistry, and K. R. Desai. "Synthesis and Antimicrobial Activity of Newer Quinazolinones." E-Journal of Chemistry 3, no. 2 (2006): 97–102. http://dx.doi.org/10.1155/2006/586512.

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2–alkyl–6–bromo–3,1–benzoxazine–4–one (2) is synthesized by treatingp–Bromoanthranilic acid and Acetylechoride or Benzoylchloride. Reaction of 2–alkyl–6–bromo–3,1–benzoxazine–4–one (2). with hydrazinehydrate furnish the corresponding 3–Amino–2–methyl–6–bromoquinazoline–4(3H)–one (3) which on reaction with benzaldehyde affordN,N– arylidene derivative (4). Reaction of 4 with various diazonium salts yields 6–bromo–2–alkyl/aryl–3{[phenyl(phenyldiazenyl)methylene]amino}quinazolin–4(3H)–one .
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2

Osarumwense, P. O. "Synthesis and Analgesic Activity of 3-Amino-6-Bromo-2-Methyl Quinazolin-4(3H) –One and 6-Bromo-2-Methyl-4H-Benzo[D] [1,3]- Oxazin-4-One." Continental J. Applied Sciences 12, no. 3 (2017): 29–39. https://doi.org/10.5281/zenodo.995719.

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<em>The current study is aimed at the synthesis and Analgesic evaluation of quinazolinone derivatives. The condensation of Methyl-2-amino-5-bromobenzoate with acetic anhydride yielded the cyclic compound 2-methyl 6-bromo-1, 3-benzo-oxazine-4-one which further produce 3-Amino-2-Methyl 6-bromoquinazolin4(3H)-ones via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Chromatography Mass Spectrophotometer and Elemental analysis. The quinazolonones were evaluated pharmacologically for their in-vivo analgesic activities by acetic acid induced wri
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3

Mikra, Chrysoula, Maria Bairaktari, Marina-Theodora Petridi, Anastasia Detsi, and Konstantina C. Fylaktakidou. "Green Process for the Synthesis of 3-Amino-2-methyl-quinazolin-4(3H)-one Synthones and Amides Thereof:DNA Photo-Disruptive and Molecular Docking Studies." Processes 10, no. 2 (2022): 384. http://dx.doi.org/10.3390/pr10020384.

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Eleven 3-amino-2-methyl-quinazolin-4(3H)-ones have been synthesized, in good to excellent yields, via their corresponding benzoxazinones using an efficient tandem microwave-assisted green process. Representative acetamides have been thermally derived from their functional free 3-amino group, whereas for the synthesis of various arylamides, a novel green microwave-assisted protocol has been developed, which involved the attack of hydrazides on benzoxazinones. Eight out of the eleven 3-amino-2-methyl-quinazolin-4(3H)-ones were found photo-active towards plasmid DNA under UVB, and four under UVA
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4

Eweas, Ahmad Farouk, Qasem Mahmoud Aref Abdallah, and Mohamed Fouad Elbadawy. "Synthesis and biological evaluation of some new 2-pyridylquinazoline derivatives." Current Chemistry Letters 10, no. 4 (2021): 459–70. http://dx.doi.org/10.5267/j.ccl.2021.4.005.

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2-pyridyl [3H]-quinazolin-4-one derivatives fused or substituted with different oxygen or nitrogen heterocycle moieties as potential anti-tumor and anti-microbial agents were prepared, characterized and biologically screened. The synthesis process started from 5-bromo-2-[pyridin-4-ylcarbonyl]amino]benzoic acid which was converted to the crucial building block 6-Bromo-2-(pyridin-4-yl)quinazolin-4(3H)-one via two alternative routes. Compound 3 underwent halogenation reaction POCl3 and PCl5 to afford compound 6-Bromo-4-chloro-2-(pyridin-4-yl)quinazoline 4. The novel cyclized products 5a,b-10 were
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5

Dahikar, Girish D., and Rajendra O. Ganjiwale. "Synthesis, Spectral Characterization, in silico Molecular Docking and Pharmacological Screening of Some Quinazoline Analogues as Anticonvulsants." Asian Journal of Chemistry 37, no. 6 (2025): 1415–20. https://doi.org/10.14233/ajchem.2025.33816.

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A new analogues of 2-methyl-3-(6-substituted-benzothiazol-2-yl)-3H-quinazolin-4-one [Dm1-Dm5] and their 6-bromo analogues [Dm6-Dm10], similarly a new analogues of 2-methyl-3-(pyridin-4-yl-formamide)-3H-quinazolin-4-one [Em1] and its 6-bromo analogue [Em2] were synthesized and characterized by melting point, elemental and spectral [FTIR, (1H and 13C) NMR and MS] methods. The anticonvulsant activity of selected analogues was assessed against maximal electroshock (MES) induced convulsions model in albino mice. The selected analogues were injected intraperitoneally at dose 20 mg/kg body weight and
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6

Osarumwense, Osarodion Peter. "Synthesis and antibacterial activity of 3-amino-6-iodo-2-methyl quinazolin 4-(3H)-one and 6-iodo-2-methyl-4H-benzo [D] [1, 3] oxazin-4-one." World Journal of Advanced Research and Reviews 2, no. 3 (2019): 014–20. https://doi.org/10.5281/zenodo.4309464.

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Quinazolines and its derivatives represent one of the most active classes of compounds, which possess wide range of biological activities like anti-bacterial, analgesic, anti-microbial, anti-inflammatory, anticancer, and anti-hypertensive ,antifungal, anti-HIV, antioxidant, analgesic, anticonvulsant, antimalarial, antitumor, anti-tubercular activities. The objective of the present study was to synthesize these quinazolinone derivatives 6-iodo-2-methyl-4H-benzo[d]-[1,3]-oxazin-4-one and 3-amino-6-iodo-2&mdash;methyl-3H-quinazolin-4-one and evaluate them for their antibacterial activity. 6-lodo-
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7

Osarumwense Peter Osarodion. "Design, synthesis and antibacterial activity of novel metal complex of 3-amino-2-methyl 6-1odo quinazolin-4(3H)-one." International Journal of Frontiers in Biology and Pharmacy Research 3, no. 1 (2022): 001–8. http://dx.doi.org/10.53294/ijfbpr.2022.3.1.0044.

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Introduction: 4(3H)-quinazolinone rings have been reported to possess different biological activities such as antibacterial, antifungal, antitubercular, antiviral, anticancer. These activities also include antihypertensive, diuretic, antimicrobial, pesticidal, anticonvulsant, anaesthetic and sedative activities, anti-malarial, and anti-diabetic.The above observations and findings stimulated my interest to synthesize these novel, Co (ll) , Cu (ll) and Zn (ll) complexes of 3-amino-2-methyl-6-lodo-quinazolin-4 (3H)-one compounds. Methods: A new Ligand 3-amino-2-methyl 6-Iodo quinazolin-4(3H)-One
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8

Osarumwense, Peter Osarodion. "Synthesis and antibacterial activity of newly synthesized 7-chloro–2–methyl-4h–benzo[d] [1, 3]–oxazin–4–one and 3–amino-7-chloro-2–methyl-quinazolin-4(3h)–one." GSC Biological and Pharmaceutical Sciences 11, no. 1 (2020): 212–20. https://doi.org/10.5281/zenodo.4277223.

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The current study is aimed at the synthesis of these quinazolinone derivatives 7-Chloro-2-Methyl-4H-benzo[d]-[1,3]-Oxazin-4-one and 3-Amino-7-Chloro-2&mdash;Methyl-3H-Quinazolin-4-One and evaluate them for their antibacterial activity.The condensation of 2-amino-methyl-4-methoxybenzoate with acetic anhydride yielded the cyclic compound 2-methyl-4, 5-disubstituted-1, 3-benzo-oxazine-4-one which further produce a novel 2,3-disubstituted quinazolin-4 ones via the reaction with hydrazine hydrate The quinazolinone derivatives 7-chloro-2-methyl-4H-benzo[d][1,3]-oxazin-4-one and 3-amino-7-chloro-2-me
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9

Thuy, Linh Bui Thi, Phuoc Le Thien, Hien Dang Chi, Hai Ha Pham Thi, and Cong Nguyen Tien. "Synthesis and antibacterial activities of some novel hybrid compounds based on 2‐mercapto‐3‐arylquinazolin‐4(3H)‐one scaffold bearing specific coumarin." Vietnam Journal of Chemistry 61, S2 (2023): 131–36. http://dx.doi.org/10.1002/vjch.202300093.

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AbstractTwo series of novel hybrid compounds, in which a variety of 2‐mercapto‐3‐arylquinazolin‐4(3H)‐ones (3a‐d)/6‐bromo‐2‐mercapto‐3‐phenylquinazolin‐4(3H)‐one (9) act as fundamental moieties are incorporated in particular 3‐(2‐bromoacetyl)‐2H‐chromen‐2‐one (4) or 2‐chloro‐N‐(2‐oxo‐2H‐chromen‐3‐yl)acetamide (5) via alkylation of the thiol group in quinazolin‐4(3H)‐one ring, were synthesized. The key intermediates (3a‐d) and (9) were prepared by the reaction of anthranilic acid (1)/2‐amino‐5‐bromobenzoic acid (8) with carbon disulfide and appropriate aromatic amines in an alkaline medium. The
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10

Peter Osarodion, Osarumwense, and Omotade Treasure Ejodamen. "Electron Impact Ionization Mass Spectra of 3-Amino 6-Chloro-2-methyl Quinazolin-4-(3H)-one Derivative." American Journal of Materials Synthesis and Processing 6, no. 1 (2021): 20. http://dx.doi.org/10.11648/j.ajmsp.20210601.13.

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11

Osarumwense, Osarodion Peter. "Synthesis and antibacterial activity of 3-amino-6-iodo-2-methyl quinazolin 4-(3H)-one and 6-iodo-2-methyl-4H-benzo [D] [1, 3] oxazin-4-one." World Journal of Advanced Research and Reviews 2, no. 3 (2019): 014–20. http://dx.doi.org/10.30574/wjarr.2019.2.3.0041.

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12

Osarumwense Peter Osarodion and Bamidele Gideon Tunmise. "Synthesis and Anti-inflammatory Activity of 5, 6-difluoro-2-Methyl-4H-benzo (d) (1, 3)-Oxazin-4-one(1) and 3-Amino-5,6-difluoro-2-Mehtyl-quinzolin 4(3H)-One(2)." International Journal of Frontline Research in Science and Technology 2, no. 1 (2023): 029–36. http://dx.doi.org/10.56355/ijfrst.2023.2.1.0128.

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Background: Inflammation is one of the means the human body uses to defend itself in the event of infection, trauma, or exposure to toxic substances and it is closely associated with a number of disease symptoms. Steroidal and non-steroidal anti-inflammatory agents have been the drugs of choice for managing inflammation. However, reports of unpleasant side effects have necessitated a search for new anti-inflammatory agents which have minimal side effects. Inflammation is an adaptive response of body tissues to external challenge or cellular injury. It is generally thought that inflammation is
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13

Fuerst, E. Patrick, Charles J. Arntzen, Klaus Pfister, and Donald Penner. "Herbicide Cross-Resistance in Triazine-Resistant Biotypes of Four Species." Weed Science 34, no. 3 (1986): 344–53. http://dx.doi.org/10.1017/s0043174500066960.

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The cross-resistance of triazine-resistant biotypes of smooth pigweed (Amaranthus hybridusL. # AMACH), common lambsquarters (Chenopodium albumL. # CHEAL), common groundsel (Senecio vulgarisL. # SENVU), and the crop canola (Brassica napusL. var. Atratower) to a selection of herbicides was evaluated at both the whole plant and chloroplast level. The triazine-resistant biotypes of all four species showed a similar pattern of cross-resistance, suggesting that a similar mutation had occurred in each species. The four triazine-resistant biotypes were resistant to injury from atrazine [6-chloro-N-eth
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14

Lodola, Alessio, Serena Bertolini, Matteo Biagetti та ін. "Atropisomerism and Conformational Equilibria: Impact on PI3Kδ Inhibition of 2-((6-Amino-9H-purin-9-yl)methyl)-5-methyl-3-(o-tolyl)quinazolin-4(3H)-one (IC87114) and Its Conformationally Restricted Analogs". Journal of Medicinal Chemistry 60, № 10 (2017): 4304–15. http://dx.doi.org/10.1021/acs.jmedchem.7b00247.

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15

Srivastav, Manish, MD Salahuddin, and S. M. Shantakumar. "Synthesis and Anti-inflammatory Activity of Some Novel 3-(6-Substituted-1, 3-benzothiazole-2-yl)-2-[{(4-substituted phenyl) amino} methyl] quinazolines-4 (3H)-ones." E-Journal of Chemistry 6, no. 4 (2009): 1055–62. http://dx.doi.org/10.1155/2009/507052.

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A series of novel 3-(6-substituted-1, 3-benzothiazole-2-yl)-2-[{(4-substituted phenyl) amino} methyl] quinazolines-4(3H)-ones were synthesized by treating 2-(chloromethyl)-3-(6-substituted-1, 3-benzothiazole-2-yl) quinazoline-4-(3H)-one (IIa-d) with various substituted amine. The compounds (IIa-d) prepared by treating 2-[(chloroacetyl) amino] benzoic acid with different 2-amino-6-substituted benzothiazole. Elemental analysis, IR,1HNMR and mass spectral data confirmed the structure of the newly synthesized compounds. Synthesized quinazolines-4-one derivative were investigated for their anti-inf
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16

Wang, Hui-Ling, Kristin L. Andrews, Shon K. Booker, et al. "Discovery of (R)-8-(6-Methyl-4-oxo-1,4,5,6-tetrahydropyrrolo[3,4-b]pyrrol-2-yl)-3-(1-methylcyclopropyl)-2-((1-methylcyclopropyl)amino)quinazolin-4(3H)-one, a Potent and Selective Pim-1/2 Kinase Inhibitor for Hematological Malignancies." Journal of Medicinal Chemistry 62, no. 3 (2019): 1523–40. http://dx.doi.org/10.1021/acs.jmedchem.8b01733.

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17

Abu-Hashem, Ameen. "Synthesis of New Furothiazolo Pyrimido Quinazolinones from Visnagenone or Khellinone and Antimicrobial Activity." Molecules 23, no. 11 (2018): 2793. http://dx.doi.org/10.3390/molecules23112793.

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Substituted-6-methyl-1-thioxo-1,2-dihydro-3H-furo[3,2-g]pyrimido[1,6-a]quinazolin-3-ones (5a,b) were synthesized from condensation of visnagenone (2a) or khellinone (2b) with 6-amino-thiouracil (3) in dimethylformamide or refluxing of (4a) or (4b) in dimethylformamide. Hence, compounds (5a,b) were used as the starting materials for preparing many new heterocyclic compounds such as; furo[3,2-g]pyrimido[1,6-a]quinazoline (6a,b), furo[3,2-g]thiazolo[2′,3′:2,3]pyrimido[1,6-a]quinazolinone (7a,b), substituted-benzylidene-furo[3,2-g]thiazolo[2′,3′:2,3]pyrimido[1,6-a]quinazoline-3,5-dione (8a–f), 3-o
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18

Meyer, Robert E., and Rodney W. Bovey. "Response of Herbaceous Vegetation in East-Central Texas to Herbicides." Weed Science 33, no. 1 (1985): 81–90. http://dx.doi.org/10.1017/s0043174500083971.

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Twenty herbicides were applied to a rangeland pasture in the Post Oak Savannah Resource Area of Texas in April 1978 and May 1979. At time of treatment, total vegetation cover was 88 to 100%, with 36% grasses and 52 to 64% broadleaf cover. From May 31 through September, total, grass, and broadleaf covers were 89 to 100, 51 to 65, and 27 to 44%, respectively. One to 2 months after treatment, grass cover generally increased except where certain herbicides, particularly bromacil (5-bromo-3-sec-butyl-6-methyluracil), dalapon (2,2-dichloropropionic acid), glyphosate [N-(phosphonomethyl)glycine], or
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19

Gerhardt, Valeska, and Michael Bolte. "6-Chloroisocytosine and 5-bromo-6-methylisocytosine: again, one or two tautomers present in the same crystal?" Acta Crystallographica Section C Structural Chemistry 72, no. 1 (2016): 84–93. http://dx.doi.org/10.1107/s2053229615024080.

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It is well known that pyrimidin-4-one derivatives are able to adopt either the 1H- or the 3H-tautomeric form in (co)crystals, depending on the coformer. As part of ongoing research to investigate the preferred hydrogen-bonding patterns of active pharmaceutical ingredients and their model systems, 2-amino-6-chloropyrimidin-4-one and 2-amino-5-bromo-6-methylpyrimidin-4-one have been cocrystallized with several coformers and with each other. Since Cl and Br atoms both have versatile possibilities to interact with the coformers, such asviahydrogen or halogen bonds, their behaviour within the cryst
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20

Low, J. N., G. Ferguson, J. Cobo, M. Nogueras, A. Sanchez, and A. Marchal. "2-Methoxy-3-methyl-6-[(triphenylphosphoranylidene)amino]pyrimidin-4(3H)-one and 3-Methyl-2-methylthio-6-[(triphenylphosphoranylidene)amino]pyrimidin-4(3H)-one." Acta Crystallographica Section C Crystal Structure Communications 54, no. 9 (1998): 1355–57. http://dx.doi.org/10.1107/s0108270198003795.

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21

Vashi, R. T., and S. B. Patel. "Synthesis, Characterization and Antifungal Activity of Novel Quinazolin-4-one Derivatives Containing 8-Hydroxyquinazoline Ligand and its Various Metal Complexes." E-Journal of Chemistry 6, s1 (2009): S445—S451. http://dx.doi.org/10.1155/2009/624150.

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Novel ligands containing quinazoline-4-one-8-hydroxyquinoline (QQ) merged moieties were prepared and characterized. For this anthranilic acid and 5-bromoanthranilic acid were converted respectively into 2-chloromethyl–3-(4-methyl phenyl)-3(H)-quinazoline-4-one and 2-chloromethyl–3-(methyl phenyl)-6-bromo-3(H)-quinazoline-4-one. Both these compounds were condensed with 5-amino-8-hydroxyquinoline. The so called resulted compounds were named respectively as 2-[(8-hydroxy-quinolinyl) –5- amino methyl] -3-(4-methylphenyl)- 3(H)- quinazoline -4- one and 2-[(8-hydroxyquinolinyl)-5-aminomethyl] -3(met
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22

Borik, Rita M., and Mohammed A. Hussein. "Synthesis, Molecular Docking, Biological Potentials and Structure Activity Relationship of New Quinazoline and Quinazoline-4-one Derivatives." Asian Journal of Chemistry 33, no. 2 (2021): 423–38. http://dx.doi.org/10.14233/ajchem.2021.23036.

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In this work, a new derivative of ethyl 5-chloro-2-(3-(4-hydroxyphenyl)propanamido)benzoate (1) was synthesized by reacting the amino group of 3-(4-hydroxyphenyl)propanoic acid (0.01 mol) and methyl 2-amino-5-chlorobenzoate in presence of PCl3. Cyclcondensation of 1 with hydrazine hydrate afforded the corresponding 2-(4-hydroxyphenethyl)-3-amino-6-chloroquinazolin-4(3H)-one (2). Also, new Schiff base 3 was prepared via reaction of 2-(4-hydroxyphenethyl)-3-amino-6-chloroquinazolin- 4(3H)-one (2) with 4-hydroxy-3-methoxybenzaldehyde. The synthesized compounds were characterized by elemental anal
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23

Hafez, Hend N., and Abdel-Rhman B. A. El-Gazzar. "Synthesis and evaluation of antitumor activity of new 4-substituted thieno[3,2-d]pyrimidine and thienotriazolopyrimidine derivatives." Acta Pharmaceutica 67, no. 4 (2017): 527–42. http://dx.doi.org/10.1515/acph-2017-0039.

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Abstract 3-Methyl-6-phenyl-2-thioxo-2,3-dihydrothieno[3,2-d]pyrimidin- 4(1H)-one (2), on treatment with phosphorous oxychoride, affored 4-chloro-3-methyl-6-phenyl -thieno[3,2-d]pyrimidine- 2(3H)-thione (3). A series of novel 6-phenyl-thieno[3,2-d]pyrimidine derivatives 4-9 bearing different functional groups were synthesized via treatment of compound 3 with different reagents. On the other hand, compound 2 was used to synthesize ethyl-[(3-methyl-6-phenyl-2-thioxo-2,3-dihydrothieno[ 3,2-d]pyrimidin-4-yl)-oxy]acetate (10), 2-hydrazinyl- -3-methyl-6-phenyl-thieno[3,2-d]pyrimidin-4(3H)-one (11), 3
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24

Molina, S., J. Cobo, M. Nogueras, A. Sanchez, G. Ferguson, and J. N. Low. "5-[Bis(trimethylsilyl)amino]-2-methoxy-3-methyl-6-(trimethylsilylamino)pyrimidin-4(3H)-one." Acta Crystallographica Section C Crystal Structure Communications 54, no. 7 (1998): IUC9800030. http://dx.doi.org/10.1107/s0108270198099533.

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25

Rodríguez, Ricaurte, Manuel Nogueras, Justo Cobo, and Christopher Glidewell. "2-Amino-3-methyl-6-[methyl(phenyl)amino]-5-nitropyrimidin-4(3H)-one: polarized molecules within hydrogen-bonded sheets." Acta Crystallographica Section C Crystal Structure Communications 65, no. 9 (2009): o441—o443. http://dx.doi.org/10.1107/s010827010902887x.

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26

Wei, Mingjie, Youyu Zhang, Haitao Li, and Shouzhuo Yao. "A new “on–off” fluorescent probe for the selective detection of copper ions in living cells." Analytical Methods 9, no. 26 (2017): 3956–61. http://dx.doi.org/10.1039/c7ay01097d.

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A new “on–off” fluorescent probe 4′,5′-bis((bis(thiophen-2-ylmethyl)amino)methyl)-2′,7′-dichloro-3′,6′-dihydroxy-3H-spiro[isobenzofuran-1,9′-xanthen]-3-one (probe F) for the selective detection of copper ions was synthesized and characterized.
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27

Orozco, Fabían, Braulio Insuasty, Justo Cobo, and Christopher Glidewell. "A hydrogen-bonded ribbon in 6-amino-3-methyl-5-nitroso-2-(pyrrolidin-1-yl)pyrimidin-4(3H)-one monohydrate and hydrogen-bonded sheets in 6-amino-2-dimethylamino-3-methyl-5-nitrosopyrimidin-4(3H)-one monohydrate." Acta Crystallographica Section C Crystal Structure Communications 65, no. 11 (2009): o549—o552. http://dx.doi.org/10.1107/s0108270109039018.

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28

Orozco, Fabían, Braulio Insuasty, Justo Cobo, and Christopher Glidewell. "A hydrogen-bonded ribbon in 6-amino-3-methyl-5-nitroso-2-(pyrrolidin-1-yl)pyrimidin-4(3H)-one monohydrate and hydrogen-bonded sheets in 6-amino-2-dimethylamino-3-methyl-5-nitrosopyrimidin-4(3H)-one monohydrate. Corrigendum." Acta Crystallographica Section C Crystal Structure Communications 69, no. 11 (2013): 1414. http://dx.doi.org/10.1107/s010827011302756x.

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29

Zhao, Yuxiang, Peter J. McCarthy, and Cyril Párkányi. "Synthesis and In Vitro Evaluation of Novel Acyclic and Cyclic Nucleoside Analogs with a Thiadiazole Ring." ISRN Organic Chemistry 2013 (March 5, 2013): 1–10. http://dx.doi.org/10.1155/2013/159164.

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The synthesis of six thiadiazole nucleoside analogs is reported: 5-diacetylamino-1,2,4-thiadiazol-3-one (1), 5-amino-2- (tetrahydrofuran-2-yl)-1,2,4-thiadiazol-3-one (2), 5-amino-3-[(2′-hydroxyethoxy)methyl]-1,3,4-thiadiazol-2-one (3), 5-amino-3-(4′-hydroxy-2′-hydroxymethyl-butyl)-1,3,4-thiadiazole-2-thione (4), (R)-5-amino-3-(2′,3′-dihydroxypropyl)-1,3,4-thiadiazole-2-thione (5), and (S)-5-amino-3-(2′,3′-dihydroxypropyl)-1,3,4-thiadiazole-2-thione (6). The synthesis, characterization, and properties of these new synthesized thiadiazole derivatives are discussed. A dimerization of 5-amino-3H-1
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30

Abonia, Rodrigo, Christopher Glidewell, John N. Low, Manuel Nogueras, and Jairo Quiroga. "6-Amino-2-(3,4-dimethoxybenzylamino)-3-methyl-5-nitrosopyrimidin-4(3H)-one: hydrogen-bonded sheets form interdigitated bilayers." Acta Crystallographica Section C Crystal Structure Communications 59, no. 5 (2003): o237—o239. http://dx.doi.org/10.1107/s0108270103006231.

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31

Dikusar, E. A., E. A. Akishina, N. A. Zhukovskaya, et al. "Synthesis of Formylphenyl 1-Oxo-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylates and Their (E)-1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-yliminomethyl Derivatives." Žurnal obŝej himii 94, no. 7 (2024): 786–804. https://doi.org/10.31857/s0044460x24070016.

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Formylphenyloxohydroepoxyisoindole carboxylates were prepared by the reaction of 4-hydroxy-3-methoxy-, 4-hydroxy-3-ethoxy- and 3-hydroxy-4-methoxybenzaldehydes with substituted isoindolecarboxylic acids {2-methyl-1-oxo-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylic, 2-(3,4-dimethoxyphenethyl)1-oxo-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylic, 2-(benzo[d][1,3]dioxol-5-ylmethyl)-1-oxo1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylic, 6-oxo-3,4,6,6a,7,8-hexahydro-2H,10bH-8,10a-epoxy[1,3]oxazino[2,3-a]isoindole-7-carboxylic, 2-(2,3-dichlorobenzyl)-1-oxo-1,2,3,6,7,7a-hexah
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32

Gann, Austin W., and Partha S. Ray. "Synthesis of 2-amino-6,7,8,9-tetrahydro-6-phenethyl-3H-pyrimido[4,5-e][1,4]diazepin-4(5H)-one: a model for a potential pyrimido[4,5-e][1,4]diazepine-based folate anti-tumor agent." Heterocyclic Communications 21, no. 6 (2015): 349–53. http://dx.doi.org/10.1515/hc-2015-0216.

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AbstractReductive cyclization of 2-{N-[(2-amino-4,6-dichloropyrimidin-5-yl)methyl]-N-phenethylamino}acetonitrile (5) with Raney nickel and hydrogen gave the chloropyrimido[4,5-e][1,4]diazepine 3 which could not be converted to 2 via an attempted nucleophilic aromatic substitution with hydroxide. The title compound (2) was prepared, however, by the reductive cyclization of 2-{N-[(2-amino-4-chloro-6-methoxypyrimidin-5-yl)methyl]-N-phenethylamino}acetonitrile (13) followed by treatment with trimethyliodosilane.
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Marchalín, Štefan, Dušan Ilavský, Jaroslav Kováč, and Milan Bruncko. "Synthesis and reactions of 5-acetyl-2-amino-3-cyano-4-(5-X-2-furyl)-6-methyl-4H-pyrans." Collection of Czechoslovak Chemical Communications 55, no. 3 (1990): 718–27. http://dx.doi.org/10.1135/cccc19900718.

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Substituted 2-amino-4-(5-X-2-furyl)-4H-pyrans IIIa-IIIe have been prepared by a cyclization reaction of 5-X-2-furylmethylenepropanedinitriles IIa-IIe with 2,4-pentanedione. In reaction of 3-(5-X-2-furyl)-methylene-2,4-pentanediones Ia-Ie with propanedinitrile the formation of 4H-pyrans IIIa-IIIe is accompanied, depending on the catalyst type, by the formation of 5-X-2-furylmethylenepropanedinitriles IIa-IIe. 2-(4-Methylbenzylideneamino)-4H-pyran (V), 2-formylamino-4H-pyran (VI), and 3H, 5H-pyrano[2,3-d]pyrimidine-4-one (VII) have been synthesized by functional modifications of the amino group
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34

Barton, Richard J., Keith E. Johnson, Beverly E. Robertson, F. Wayne Yerhoff, and Shengzhi Hu. "Structures of the pyrazolones formed by oxidative coupling of phenols with 4-aminoantipyrine." Canadian Journal of Chemistry 65, no. 9 (1987): 2082–88. http://dx.doi.org/10.1139/v87-345.

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The structures of reaction products between 4-amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one and o-cresol, p-cresol, and p-ethylphenol are reported. The reaction of the former compound with phenols is used to estimate the concentration of phenol in potable water supplies. The reaction products are 2,3-dimethyl-4-[4-oxo-2,5-cyclohexadien-1-ylidene)amino]-1-phenyl-3-pyrazolin-5-one (monoclinic, P21/c, red, Z = 4, a = 7.092(1), b = 26.616(2), c = 8.644(2) Å, β = 79.17(3)°, 1432 reflections, R = 0.083, Rw = 0.040), 1,9a-dihydro-1,6,9a-trimethyl-2-phenylpyrazolo[3,4-b][1,4]benzoxazin-3(2H)-one (orth
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35

Turner, D. L., S. S. Sharpe, and Ray Dickens. "Herbicide Effects on Tensile Strength and Rooting of Centipedegrass Sod." HortScience 25, no. 5 (1990): 541–44. http://dx.doi.org/10.21273/hortsci.25.5.541.

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“Effects of selected herbicides on sod tensile strength and rooting of mature and immature turf of common centipedegrass [Eremochloa ophiuroides (Munro.) Hack] were studied in field experiments. Herbicides evaluated were atrazine, atrazine + tridiphane, bensulide, DCPA, DPX-6316, imazapyr, imazaquin, napropamide, oxadiazon, pendimethalin, sethoxydim, simazine, and sulfometuron. At 2, 4, and 8 weeks after treatment (WAT), sod tensile strength was determined, and root length and number were measured 7 to 10 days later. In 1986 sod tensile strength was not affected, but in 1987 the tensile streng
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36

Trilleras, Jorge, Juan Ramos, Justo Cobo, and Christopher Glidewell. "5,5′-Methylenebis[6-amino-3-methyl-2-methylsulfanylpyrimidin-4(3H)-one]: an unusual molecular geometry within a hydrogen-bonded molecular ribbon." Acta Crystallographica Section C Crystal Structure Communications 69, no. 9 (2013): 1043–46. http://dx.doi.org/10.1107/s0108270113020465.

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The molecules of the title compound, C13H18N6O2S2, lie across twofold rotation axes in the space groupC2/c. Although the pyrimidine ring is effectively planar, the bridging methylene C atom is displaced from the plane of the pyrimidine ring by 0.213 (2) Å, while the C—C—C angle at the bridging C atom is 120.3 (2)°. The molecule contains two symmetry-related N—H...O hydrogen bonds, generatingS(8) motifs, and intermoecular N—H...O hydrogen bonds link the molecules into a ribbon of edge-fused rings.
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37

Rasheed, Anaam M., Sinan M. M. Al-Bayati, Dr Rehab A. M. Al-Hasani, and Muna Ali Shakir. "Synthesizing, Structuring, and Characterizing Bioactivities of .Cr(III), La(III), and Ce(III) .Complexes with Nitrogen, Oxygen .and Sulpher donor bidentate Schiff base ligands." Baghdad Science Journal 18, no. 4(Suppl.) (2021): 1545. http://dx.doi.org/10.21123/bsj.2021.18.4(suppl.).1545.

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Two Schiff bases, namely, 3-(benzylidene amino) -2-thioxo-6-methyl 2,5-dihydropyrimidine-4(3H)-one (LS])and 3-(benzylidene amino)-6-methyl pyrimidine 4(3H, 5H)-dione(LA)as chelating ligands), were used to prepare some complexes of Cr(III), La(III), and Ce(III)] ions. Standard physico-chemical procedures including metal analysis M%, element microanalysis (C.H.N.S) , magnetic susceptibility, conductometric measurements, FT-IR and UV-visible Spectra were used to identify Metal (III) complexes and Schiff bases (LS) and (LA). According to findings, a [Cr(III) complex] showed six coordinated octahed
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38

Kulakov, Ivan, Mariya Matsukevich, Maxim Levin, Irina Palamarchuk, Tulegen Seilkhanov, and Alexander Fisyuk. "Synthesis of the First Representatives of Thieno[3,2-c][1,7]naphthyridine Derivatives Based on 3-Amino-6-methyl-4-(2-thienyl) pyridin-2(1H)-one." Synlett 29, no. 13 (2018): 1741–44. http://dx.doi.org/10.1055/s-0037-1610445.

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A one-pot method for obtaining novel thieno[3,2-c][1,7]naphthyridine derivatives based on the reaction of 3-amino-4-(thien-2-yl)pyridin-2(1H)-one with aromatic aldehydes in 80% ­phosphoric acid at 130 °C has been developed. The formation of the thieno[3,2-c][1,7]naphthyridine ring was due to the intermediate generation of the corresponding azomethine, which underwent intra­molecular cyclization with electrophilic attack of the β-carbon atom of the thiophene core under Pictet–Spengler conditions. The isolated 5,7-dihydrothieno[3,2-c][1,7]naphthyridin-4(3H)-ones underwent oxidative aromatization
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39

Berchielli-Robertson, D. L., C. H. Gilliam, and D. C. Fare. "Preemergence Herbicide Control of Eclipta alba in Container-grown Plants." HortScience 24, no. 5 (1989): 779–81. http://dx.doi.org/10.21273/hortsci.24.5.779.

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Abstract Preemergence herbicides were evaluated for control of yerba-de-tago [Eclipta alba (L.) Hasskarl] and for phytotoxicity to four container-grown landscape species. Herbicides providing excellent control (less than one weed/pot) were chlorimuron at 0.035 and 0.07 kg·ha-1, chlorimuron + metribuzin at 0.075 + 0.485 kg·ha-1, and oryzalin at 4.5 and 9.0 kg·ha-1. Injury within 30 days after treatment occurred with applications of oxyfluorfen, lactofen, and fomesafen at the × 1 and × 2 rates on Ilex vomitoria Ait. ‘Nana’ (dwarf yaupon), Rhododendron satsuki ‘Pink Gumpo’ (‘Pink Gumpo’ azalea),
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40

Abdel-Rahman, Abdu E., Etify A. Bakhite, and Elham A. Al-Taifi. "Fluorine-containing Heterocycles: Part II Synthesis and Reactions of New Thieno[2,3-b]Pyridine Derivatives Bearing Trifluoromethyl Group." Journal of Chemical Research 2005, no. 7 (2005): 461–68. http://dx.doi.org/10.3184/030823405774309014.

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Ethyl [3-cyano-6-(2-thienyl)-4-trifluoromethylpyridin-2-ylthio]acetate (2) and ethyl 3-amino-6-(2-thienyl)-4-trifluoromethylthieno[2,3-b]pyridine-2-carboxylate (3) were prepared by reaction of 3-cyano-6-(2-thienyl)-4-trifluoromethylpyridine-2(1H)-thione (1) with ethyl chloroacetate. The reaction of both 2 and 3 with hydrazine hydrate under different conditions was studied. The main products were [3-cyano-6-(2-thienyl)-4-trifluoromethyl-2-pyridinylthio]acetohydrazide (4) and 3-amino-6-(2-thienyl)-4-trifluoromethylthieno[2,3-b]pyridine-2-carbohydrazide (5). The condensation of acethydrazide 4 wi
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41

McCarty, Lambert B., and Daniel L. Colvin. "Buffalograss Tolerance to Postemergence Herbicides." HortScience 27, no. 8 (1992): 898–99. http://dx.doi.org/10.21273/hortsci.27.8.898.

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Buffalograss [Buchloe dactyloides (Nutt.) Engelm.] is a turfgrass species traditionally adapted to low-rainfall areas that may incur unacceptable weed encroachment when grown in higher rainfall areas such as Florida. An experiment was performed to evaluate the tolerance of two new buffalograss cultivars, `Oasis' and `Prairie', to postemergence herbicides commonly used for grass, broadleaf, and sedge weed control. Twenty to 40 days were required for each cultivar to recover from treatment with asulam, MSMA, and sethoxydim (2.24, 2.24, and 0.56 kg-ha-l, respectively). Other herbicides used for p
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42

Weisburger, J. H., A. Rivenson, J. Reinhardt, et al. "Genotoxicity and Carcinogenicity in Rats and Mice of 2-Amino-3, 6- dihydro-3-methyl-7H-imidazolo [4, 5-f]quinolin-7-one: an Intestinal Bacterial an Intestinal Bacterial Metabolite of 2-Amino-3-methyl-3H-imidazo[4, 5-f]quinoline." JNCI Journal of the National Cancer Institute 86, no. 1 (1994): 25–30. http://dx.doi.org/10.1093/jnci/86.1.25.

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43

Wu, T. Y., та Y. C. Chang. "Hydrodynamic and pharmacological characterization of putative α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid/kainate-sensitive l-glutamate receptors solubilized from pig brain". Biochemical Journal 300, № 2 (1994): 365–71. http://dx.doi.org/10.1042/bj3000365.

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L-[3H]Glutamate binding sites with characteristics resembling that of membrane-bound alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)/kainate-subtype L-glutamate receptors have been solubilized from pig brain synaptic junctions by Triton X-114. Binding of [3H]AMPA to these soluble sites in the presence of KSCN results in a curvilinear Scatchard plot that can be resolved into a high-affinity component and a low-affinity component. These Triton-X-114-solubilized sites can be further separated into two species of binding sites by gel-filtration chromatography or sucrose-density-gra
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44

Kayed, Akram M., EL Sayed M. Elghaly, and Atef A. El-Hela. "New Epoxy Megastigmane glucoside from Dactyloctenium aegyptium L.P.Beauv Wild (Crowfootgrass)." Journal of Scientific and Innovative Research 4, no. 6 (2015): 237–44. http://dx.doi.org/10.31254/jsir.2015.4605.

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Phytochemical investigation of Dactyloctenium aegyptium L. Wild herbrevealed the isolation and identification of three new compounds5-hydroxypyrimidine- 2,4 (3H,5H)- dione [6],6'Glyceryl asysgangoside[8],and 2 amino, 2 methyl,(5,6 di hydroxymethyl ), 1,4 dioxane [11]were isolated for the first time from nature in addition tonine known compounds, P.hydroxy benzaldhyde[1], tricin [2],P.hydroxy benzoic acid[3], vanillic acid [4], β-sitosterol-3-O-β-D-glucoside [5], asysgangoside[7] adenine[9], uridine[10] and sucrose[12]The structural elucidations of isolated compounds were established on the bas
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45

Croon, Kent A., and Morris G. Merkle. "Effects of Bentazon, Imazaquin, or Chlorimuron on Haloxyfop or Fluazifop-P Efficacy." Weed Technology 2, no. 1 (1988): 36–40. http://dx.doi.org/10.1017/s0890037x00030049.

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Field studies were conducted to measure the response of sorghum [Sorghum bicolor(L.) Moench. ‘Conlee's Top Hand’] to foliar applications of haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} or fluazifop-P {(R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} plus either bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] at 0.84 kg ai/ha imazaquin {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} at 0.21 kg ae/ha, or chlorimuron {2-[[[[(4-chloro-6-methoxy-2-pyrimi
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46

Guerrero, Sergio A., Juan E. Ramírez, Alirio Palma, Justo Cobo, and Christopher Glidewell. "A concise and versatile route to tetrahydro-1-benzazepines carrying [a]-fused heterocyclic units: synthetic sequence and spectroscopic characterization, and the molecular and supramolecular structures of one intermediate and two products." Acta Crystallographica Section C Structural Chemistry 75, no. 2 (2019): 168–77. http://dx.doi.org/10.1107/s2053229619000871.

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A concise, efficient and versatile route from simple starting materials to tricyclic tetrahydro-1-benzazepines carrying [a]-fused heterocyclic units is reported. Thus, the easily accessible methyl 2-[(2-allyl-4-chlorophenyl)amino]acetate, (I), was converted, via (2RS,4SR)-7-chloro-2,3,4,5-tetrahydro-1,4-epoxy-1-benzo[b]azepine-2-carboxylate, (II), to the key intermediate methyl (2RS,4SR)-7-chloro-4-hydroxy-2,3,4,5-tetrahydro-1H-benzo[b]azepine-2-carboxylate, (III). Chloroacetylation of (III) provided the two regioisomers methyl (2RS,4SR)-7-chloro-1-(2-chloroacetyl)-4-hydroxy-2,3,4,5-tetrahydro
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47

Maram, K., K. Anitha, R. Sreenivasulu, and R. R. Raju. "[BMIM]BF4-Mediated One-Pot Synthesis of 6-Amino-5-{(4-hydroxy-2-oxo-2H-chromen-3-yl)[1H-pyrazol-5(4)-yl]­methyl}-1,3-dimethylpyrimidine-2,4(1H,3H)-diones." Russian Journal of Organic Chemistry 59, no. 3 (2023): 478–82. http://dx.doi.org/10.1134/s1070428023030168.

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48

Gilbertz, D. A., and B. J. Johnson. "Response of Bedding Plants and Weeds to Herbicides." Journal of Environmental Horticulture 5, no. 4 (1987): 158–62. http://dx.doi.org/10.24266/0738-2898-5.4.158.

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Preemergence and postemergence herbicides were evaluated for summer weed control and for phytotoxicity of 6 commonly used annual bedding plant species. Dacthal (dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate), Enide (N,N-dimethyl-a-phenyl benzene acetamide), Devrinol (N,N-diethyl-2-(1-naphthalenyloxy) propanamide), Surflan (4-(dipropylamino)-3,5-dinitro-benzenesulfonamide), Ronstar (3-[2,4-dichloro-5-(1-methylethoxy)phenyl]-5-1(1,1-dimethylethy1)-1,3,4-oxadiazol-2-(3H)-one), Kerb (3,5-dichloro(N-l, 1-dimethyl-2-propynyl)benzamide), and Treflan (2,6-dinitro-N,N-dipropyl-4-(trifluoromethy
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49

Johnson, B. Jack. "Creeping Bentgrass Quality following Preemergence and Postemergence Herbicide Applications." HortScience 29, no. 8 (1994): 880–83. http://dx.doi.org/10.21273/hortsci.29.8.880.

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Three field experiments were conducted to determine if several preemergence and postemergence herbicides were safe to apply to creeping bentgrass (Agrostis stolonifera L. `Penncross') maintained at putting green height. When dithiopyr was applied at preemergence in late February or early March, the emulsifiable concentrate formulation (≤1.7 kg·ha-1) and granular formulation (≤1.1 kg·ha-1) did not reduce the quality or cover of creeping bentgrass. Applied at preemergence, bensulide plus oxadiazon at 6.7 + 1.7 kg·ha-1 and 13.4 + 3.4 kg·ha-1 reduced turfgrass quality for 2 to 3 weeks and 8 weeks
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50

Wallace, J. L., P. L. Beck, and G. P. Morris. "Is there a role for leukotrienes as mediators of ethanol-induced gastric mucosal damage?" American Journal of Physiology-Gastrointestinal and Liver Physiology 254, no. 1 (1988): G117—G123. http://dx.doi.org/10.1152/ajpgi.1988.254.1.g117.

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The role of leukotriene (LT) C4 as a mediator of ethanol-induced gastric mucosal damage was investigated. Rats were pretreated with a number of compounds, including inhibitors of leukotriene biosynthesis [4-bromo-2,7-dimethoxy-3H-phenothiazin-3-one (L651,392), 3-amino-[m-(trifluoromethyl)-phenyl]-2-pyrazoline hydrochloride (BW755c), and dexamethasone] and agents that have previously been shown to reduce ethanol-induced damage [prostaglandin E2, 2-decarboxy-2-hydroxymethyl-15-deoxy-16RS-hydroxy-16- methyl prostaglandin E1 (Rioprostil), FPL52694] prior to oral administration of absolute ethanol.
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