Relevant bibliographies by topics / Planare Chiralität

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Planare Chiralität'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Planare Chiralität"

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Gagnon, Christina, Éric Godin, Clémentine Minozzi, Johann Sosoe, Corentin Pochet, and Shawn K. Collins. "Biocatalytic synthesis of planar chiral macrocycles." Science 367, no. 6480 (2020): 917–21. http://dx.doi.org/10.1126/science.aaz7381.

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Macrocycles can restrict the rotation of substituents through steric repulsions, locking in conformations that provide or enhance the activities of pharmaceuticals, agrochemicals, aroma chemicals, and materials. In many cases, the arrangement of substituents in the macrocycle imparts an element of planar chirality. The difficulty in predicting when planar chirality will arise, as well as the limited number of synthetic methods to impart selectivity, have led to planar chirality being regarded as an irritant. We report a strategy for enantio- and atroposelective biocatalytic synthesis of planar
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Dincer, Furkan, Muharrrem Karaaslan, Oguzhan Akgol, Emin Unal, Ekrem Demirel, and Cumali Sabah. "New generation planar chiral metamaterials with small and constant chirality over a certain frequency band." Modern Physics Letters B 29, no. 01 (2015): 1450257. http://dx.doi.org/10.1142/s0217984914502571.

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Chiral metamaterial (MTM) researchers generally concentrate and aim to obtain large chirality with optical activity in certain frequencies. However, new generation planar chiral MTM which have small and constant/flat chirality over a certain frequency band have not queried by this time in literature. In fact, this area is mostly ignored by researchers. This study, first one according to best of our knowledge in the literature, is investigating the small and constant/fixed chirality and focuses on the new generation planar chiral MTM based on circular split ring resonators (SRRs), in details. I
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Funk, Michael A. "Enzymes lock in planar chirality." Science 367, no. 6480 (2020): 864.17–866. http://dx.doi.org/10.1126/science.367.6480.864-q.

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Ballardini, Roberto, Vincenzo Balzani, Jan Becher, et al. "Tetrathiafulvalenenaphthalenophanes: Planar Chirality andcis/transPhotoisomerization." Journal of Organic Chemistry 65, no. 13 (2000): 4120–26. http://dx.doi.org/10.1021/jo0001941.

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Si, Debjani, and Mark W. Peczuh. "Synthesis, structure and reactivity of [15]-macrodilactones." Organic & Biomolecular Chemistry 13, no. 23 (2015): 6463–67. http://dx.doi.org/10.1039/c5ob00809c.

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Synthesis and characterization of some new [15]-macrodilactones revealed that the interplay between three planar units, a stereogenic center and a hinge atom generated a planar chirality that governs their molecular topology.
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Šebesta, Radovan, and Marta Sališová. "Derivatives of (S)-{[2-(Methoxymethyl)pyrrolidin-1-yl]methyl}ferrocene - New Planar Chiral Ligands." Collection of Czechoslovak Chemical Communications 67, no. 11 (2002): 1700–1708. http://dx.doi.org/10.1135/cccc20021700.

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New planar chiral amino-alcohol ferrocene ligands based on (S)-2-(methoxymethyl)pyrrolidine were synthesized and employed in the enantioselective addition of diethylzinc to benzaldehyde with enantioselectivity up to 82%. The effect of planar chirality was evaluated.
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Rickhaus, Michel, Marcel Mayor, and Michal Juríček. "Chirality in curved polyaromatic systems." Chemical Society Reviews 46, no. 6 (2017): 1643–60. http://dx.doi.org/10.1039/c6cs00623j.

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Chiral non-planar polyaromatic systems that display zero, positive or negative Gaussian curvature are analysed and their potential to ‘encode’ chirality of larger sp<sup>2</sup>-carbon allotropes is evaluated. Shown is a hypothetical peanut-shaped carbon allotrope, where helical chirality results from the interplay of various curvature types.
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Mulas, Andrea, Yasmine Willener, James Carr-Smith, et al. "The effect of central and planar chirality on the electrochemical and chiral sensing properties of ferrocenyl urea H-bonding receptors." Dalton Transactions 44, no. 16 (2015): 7268–75. http://dx.doi.org/10.1039/c5dt00554j.

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Furlani, E. P., H. S. Jee, H. S. Oh, A. Baev, and P. N. Prasad. "Laser Writing of Multiscale Chiral Polymer Metamaterials." Advances in OptoElectronics 2012 (September 10, 2012): 1–7. http://dx.doi.org/10.1155/2012/861569.

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A new approach to metamaterials is presented that involves laser-based patterning of novel chiral polymer media, wherein chirality is realized at two distinct length scales, intrinsically at the molecular level and geometrically at a length scale on the order of the wavelength of the incident field. In this approach, femtosecond-pulsed laser-induced two-photon lithography (TPL) is used to pattern a photoresist-chiral polymer mixture into planar chiral shapes. Enhanced bulk chirality can be realized by tuning the wavelength-dependent chiral response at both the molecular and geometric level to
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Chen, Jin-Fa, Jin-Dong Ding, and Tai-Bao Wei. "Pillararenes: fascinating planar chiral macrocyclic arenes." Chemical Communications 57, no. 72 (2021): 9029–39. http://dx.doi.org/10.1039/d1cc03778a.

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This review overviews recent research in the planar chiral pillararene field in terms of enantioselective recognition, chiral switches, chirality sensing, asymmetric catalysis, metal–organic frameworks, circularly polarized luminescence, and permeable membranes.
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Dissertations / Theses on the topic "Planare Chiralität"

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Schaarschmidt, Dieter. "Über chirale Phosphinoferrocene und deren Anwendung in der (atropselektiven) Synthese räumlich gehinderter Biaryle über eine Suzuki-Miyaura-Reaktion." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-158105.

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Die vorliegende Dissertation beschäftigt sich mit der Synthese und Charakterisierung drei verschiedener Typen chiraler Phosphinoferrocene sowie deren Anwendung in der Palladiumkatalysierten Suzuki-Miyaura-Reaktion. Der Schwerpunkt liegt dabei auf Untersuchungen zur Synthese räumlich gehinderter Biaryle sowie auf atropselektiven Biarylkupplungen. Über eine Ullmann-artige Kupplung von Iodferrocen mit sekundären Alkoholen wurden zunächst chirale Ferrocenylalkylether synthetisiert, die mit Hilfe dirigierter Lithiierungen in 1,1'-disubstituierte Phosphinoferrocene der Art Fe( 5-C5H4OR)( 5-C5H4-C6H4
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Isaac, Kévin. "Synthèse d’acides phosphoriques à chiralité planaire et applications en catalyse énantioselective." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112301/document.

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Les acides phosphoriques chiraux sont des organocatalyseurs très efficaces qui permettent de catalyser une grande variété de réactions asymétriques. Depuis leur développement en 2004, de nombreux acides phosphoriques à chiralité axiale ou à chiralité centrale ont vu le jour. Cependant, aucun exemple d’acides phosphoriques à chiralité planaire n’avait été reporté.Deux nouvelles familles d’acides phosphoriques à chiralité planaire, possédant un motif paracyclophane et un espaceur ferrocénique ou biphénylène, ont été développées au laboratoire. Les propriétés catalytiques de ces nouvelles famille
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Wu, Zhiyong. "Synthèse de nouveaux catalyseurs chiraux d’or(I) et applications en catalyse énantiosélective." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS244.

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Les réactions de cycloisomérisation sont des outils puissant pour la synthèse d’hétérocycles et de carbocycles, tant sous leur forme racémique qu’énantioenrichie. La cyclisation directe de substrats énynes, afin de former des nouvelles liaisons carbone-carbone ou carbone-hétéroatome s’est révélée être une approche efficace, tant en économie d’atomes qu’en nombres d’étapes de synthèse, pour l’obtention de composés bicycliques ou tricycliques. Les réactions de cyclisation des substrats énynes-1,5 et 1,6 sont certainement les exemples les plus marquants. Dans notre équipe de recherche, depuis que
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Korb, Marcus. "Anionic Phospho-Fries Rearrangements for the Synthesis of Planar-Chiral Ferrocenes and their Application in (atropselective) Suzuki-Miyaura Reactions." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-229081.

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The present PhD thesis describes the synthesis and characterization of novel planarchiral 1,2-P,O-ferrocenes and their application in the Pd-catalyzed Suzuki-Miyaura reaction. It was especially focused on the development of a new synthetic pathway to this type of substitution pattern by applying the anionic phospho-Fries rearrangement in ferrocene chemistry. Starting from hydroxy ferrocene, a high diversity of Fc–O–P- type (Fc = (n5-C5H5)(n5-C5H4)) compounds were synthesized, whereby the electronic properties of the phosphorus fragments were varied. The anionic phospho-Fries rearrangement succ
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Iali, Wissam. "Iridacycles à chiralité planaire : concepts, synthèses et applications." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00780060.

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L'un des axes de recherche du laboratoire Synthèse Métallo-Induites consiste en le développement de nouveaux complexes métallacycliques à chiralité planaire. Le défi majeur de cette thèse, a été l'élaboration de nouvelles approches sélectives de synthèse de complexes cationiques et neutres métallacyliques à chiralité planaire dont le métal chélaté est un centrestéréogène pseudo-tétraédrique.Le projet de thèse fut initié lors de l'étude d'une réaction inhabituelle de cycloruthénation d'un ligand dérivé de la 2-phénylpyridine qui était capable de produire un complexe ruthénacyclique OC-6 triscat
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Iali, Wissam Nabil. "Iridacycles à chiralité planaire : concepts, synthèses et applications." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAF020/document.

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L’un des axes de recherche du laboratoire Synthèse Métallo-Induites consiste en le développement de nouveaux complexes métallacycliques à chiralité planaire. Le défi majeur de cette thèse, a été l’élaboration de nouvelles approches sélectives de synthèse de complexes cationiques et neutres métallacyliques à chiralité planaire dont le métal chélaté est un centrestéréogène pseudo-tétraédrique.Le projet de thèse fut initié lors de l’étude d’une réaction inhabituelle de cycloruthénation d’un ligand dérivé de la 2-phénylpyridine qui était capable de produire un complexe ruthénacyclique OC-6 triscat
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Forcher, Gwénaël. "Vers la synthèse de carbènes N-hétérocycliques chiraux." Phd thesis, Université du Maine, 2013. http://tel.archives-ouvertes.fr/tel-01019677.

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Depuis une dizaine d'années, les carbènes N-hétérocycliques(CNHs) ont prouvé leur efficacité en organocatalyse et comme ligands en catalyse organométallique. Dans ce contexte nous avons souhaité développer deux nouvelles familles decarbènes N hétérocycliques originaux :* La première famille de CNHs étudiée comporte une chiralité planaire apportée par un motif ferrocénique énantiomériquement pur lié directementsur l'hétérocycle imidazolium ou triazolium. Diverses stratégies ont été envisagées et étudiées afin de préparer des précurseurs de CNH à chiralité planaire.Ces travaux ont notamment perm
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Schulte, Thorben Rüdiger. "Metal- and Ligand-Centered Chirality in Square-Planar Coordination Compounds." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://hdl.handle.net/21.11130/00-1735-0000-0005-126A-0.

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Stemper, Jérémie. "Développement d’une nouvelle famille d’acides phosphoriques à chiralité planaire pour l’organocatalyse." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112260.

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Depuis les années 2000 le domaine de l’organocatalyse asymétrique est en plein développement comme le montre le nombre croissant de publications sur le sujet. Durant cet essor un grand nombre d’organocatalyseurs a été développé, ils se classent en quatre catégories : les catalyseurs de transfert de phase, les bases de Lewis, les bases de Brønsted et les acides de Brønsted. Appartenant à cette dernière catégorie, les acides phosphoriques chiraux font partie des acides de Brønsted les plus populaire. Leurs premières utilisations en organocatalyse asymétrique remontent à 2004 où des acides phosph
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Ernst, Silvia [Verfasser], Gebhard [Akademischer Betreuer] Haberhauer, and Georg [Akademischer Betreuer] Jansen. "Kontrolle planarer und axialer Chiralität mittels cyclopeptidischer Klammern / Silvia Ernst. Gutachter: Georg Jansen. Betreuer: Gebhard Haberhauer." Duisburg, 2012. http://d-nb.info/1024034658/34.

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Books on the topic "Planare Chiralität"

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Antos, R., and Y. Otani. The dynamics of magnetic vortices and skyrmions. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198787075.003.0022.

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This chapter argues that control of magnetic domains and domain wall structures is one of the most important issues from the viewpoint of both applied and basic research in magnetism. Its discussion is however limited to static and dynamic properties of magnetic vortex structures. It has been revealed both theoretically and experimentally that for particular ranges of dimensions of cylindrical and other magnetic elements, a curling in-plane spin configuration is energetically favored, with a small region of the out-of-plane magnetization appearing at the core of the vortex. Such a system, whic
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Book chapters on the topic "Planare Chiralität"

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Hellwich, Karl-Heinz. "Planare Chiralität." In Stereochemie — Grundbegriffe. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-10051-6_38.

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Clayden, Jonathan. "Enantioselective Synthesis by Lithiation to Generate Planar or Axial Chirality." In Organolithiums in Enantioselective Synthesis. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-36117-0_8.

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Burns, Noah Z., and Phil S. Baran. "Point-to-Planar Chirality Transfer in Total Synthesis: Scalable and Programmable Synthesis of Haouamine A and Its Atropisomer." In Asymmetric Synthesis II. Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527652235.ch2.

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Aubert, C., M. Malacria, and C. Ollivier. "Control of Planar Chirality." In Stereoselective Pericyclic Reactions, Cross Coupling, and C—H and C—X Activation. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-203-00126.

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Fiaud, J. C., and A. Marinetti. "Approaches to Ferrocenylphosphines with Planar Chirality." In Organophosphorus Compounds (incl. RO-P and RN-P). Georg Thieme Verlag KG, 2009. http://dx.doi.org/10.1055/sos-sd-042-00468.

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Porcel García, Susana. "Gold Catalyzed Asymmetric Transformations." In Current Topics in Chirality - From Chemistry to Biology. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97519.

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In this chapter, the strategies developed to attain asymmetric reactions with gold are disclosed. Because of its preferred linear arrangement, to induce asymmetry, gold(I) needs to fulfill one of the following requirements: a) the use of bulky chiral ligands, that create a chiral pocket around the active site, b) the coordination to bifunctional ligands capable to establish secondary interactions with substrates, or c) tight ion pairing with chiral counteranions. On the other hand, gold(III) profits of a square-planar coordination mode, which approaches chiral ligands to substrates. However, its tendency to be reduced leads to difficulties for its applications in catalytic asymmetric transformations. Pioneering works using cyclometaled structures, have found the balance between stability and activity, showing its potential in asymmetric transformations.
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Glusker, Jenny Pickworth, and Kenneth N. Trueblood. "Anomalous scattering and absolute configuration." In Crystal Structure Analysis. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780199576340.003.0019.

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The concept of the carbon atom with four bonds extending in a tetrahedral fashion was put forward by van’t Hoff and Le Bel in 1874. It coincided with the realization that such an arrangement could be asymmetric if the four substituents were different, as shown in Figure 10.1a (van’t Hoff, 1874; Le Bel, 1874). Thus, for any compound containing one such asymmetric carbon atom, there are two isomers of opposite chirality (individually called enantiomers), for which threedimensional representations of their structural formulas are related by a mirror plane. Aqueous solutions of these enantiomers rotate the plane of polarized light in opposite directions. As discussed in Chapter 7, Pasteur showed that crystals of sodium ammonium tartrate had small asymmetrically located faces and that crystals with these so-called “hemihedral faces” rotated the plane of polarization of light clockwise, while crystals with similar faces in mirror-image positions rotated this plane of polarization counterclockwise. Thus the external form (that is, the morphology) of the crystals illustrated in Figure 10.1b was used to separate enantiomers (see Patterson and Buchanan, 1945). Pure enantiomers can only crystallize in noncentrosymmetric space groups unless both isomers are present. But even if the chemical formula and the three-dimensional structure of a molecule such as tartaric acid have been determined by standard X-ray diffraction methods, there is an ambiguity about the absolute configuration. Information about the absolute configuration is not contained in the diffraction pattern of the crystal as it is normally measured. Thus, although the substituents on the asymmetric carbon atoms have been identified, and even the detailed three-dimensional geometry of the molecule has been determined, it is not known which of the two enantiomers (mirror-image forms, analogous to those shown in Figure 10.1a) represents the three-dimensional structure of a particular individual molecule that has some distinguishing chiral property, such as the ability to rotate the plane of polarized light to the right. In other words, what is the absolute structure of the dextrorotatory form of the compound under study? A means of determining the absolute configurations of molecules was, however, provided by X-ray crystallographic studies.
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Conference papers on the topic "Planare Chiralität"

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Mazor, Y., and Ben Z. Steinberg. "Longitudinal chirality, particle clusters, and planar nanoscale one-way guiding." In 2012 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting. IEEE, 2012. http://dx.doi.org/10.1109/aps.2012.6349281.

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Zhu, Alexander Y., Wei Ting Chen, Aun Zaidi, et al. "Giant higher-order multipoles enable strong intrinsic chirality in planar nanostructures." In Frontiers in Optics. OSA, 2017. http://dx.doi.org/10.1364/fio.2017.jw3a.92.

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Richards, Christopher, and Geraint Jones. "Virtual Planar Chirality. A New Approach to Catalyst and Ligand Design." In The 4th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2000. http://dx.doi.org/10.3390/ecsoc-4-01873.

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Krasavin, Alexey V., Alexander S. Schwanecke, Yifang Chen, and Nikolay I. Zheludev. "Planar Chirality in Nanostructures: Polarization Conversion and "Focusing" of Light Propagating through Small Chiral Holes." In Nanophotonics for Information Systems. OSA, 2005. http://dx.doi.org/10.1364/npis.2005.nwa5.

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