<?xml version="1.0" encoding="UTF-8"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-10-19T04:51:50Z</responseDate><request verb="GetRecord" identifier="oai:ebyu-rdlopen.rawdatalibrary.net:ebyu/12412" metadataPrefix="oai_dc">https://ebyu-rdlopen.rawdatalibrary.net/oai/request</request><GetRecord><record><header><identifier>oai:ebyu-rdlopen.rawdatalibrary.net:ebyu/12412</identifier><datestamp>2026-10-18T21:13:21Z</datestamp><setSpec>openaire</setSpec><setSpec>driver</setSpec><setSpec>com_ebyu_10000</setSpec><setSpec>col_ebyu_10001</setSpec></header><metadata><oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><dc:title>Crystal structure and Hirshfeld surface analysis of isopropyl 4-[2-fluoro-5-(trifluoromethyl)phenyl]-2,6,6-trimethyl-5-oxo-1,4,5,6,7,8-hexahydro-quinoline-3-carboxylate</dc:title><dc:creator>Yıldırım, Sema Öztürk</dc:creator><dc:creator>Akkurt, Mehmet</dc:creator><dc:creator>Çetin, Gökalp</dc:creator><dc:creator>Şimşek, Rahime</dc:creator><dc:creator>Butcher, Ray J.</dc:creator><dc:creator>Bhattarai, Ajaya</dc:creator><dc:subject>1,4-dihydropyridine ring</dc:subject><dc:subject>crystal structure</dc:subject><dc:subject>cyclohexene ring</dc:subject><dc:subject>Hirshfeld surface analysis</dc:subject><dc:subject>quinoline ring system</dc:subject><dc:subject>van der Waals interactions</dc:subject><dc:description>In the title compound, C23H25F4NO3, the 1,4-dihydropyridine ring adopts a distorted boat conformation, while the cyclohexene ring is almost showing a half-chair conformation. In the crystal, intermolecular N—H· · ·O hydrogen bonds connect the molecules into chains with graph-set motif C(6) parallel to the a-axis. These chains are linked together by C—H· · ·O and C—H· · ·F interactions, forming a three-dimensional network. In addition, C—H· · ·π interactions link the molecules into layers parallel to the (100) plane. A Hirshfeld surface analysis was performed to further investigate the intermolecular interactions. © 2023 International Union of Crystallography. All rights reserved.</dc:description><dc:publisher>International Union of Crystallography</dc:publisher><dc:date>2023</dc:date><dc:type>Article</dc:type><dc:identifier>https://rdlopen.rawdatalibrary.net/r/ebyu/12412</dc:identifier><dc:identifier>https://doi.org/10.1107/s205698902300141x</dc:identifier><dc:identifier>2056-9890</dc:identifier><dc:language>en</dc:language><dc:relation>Acta Crystallographica Section E: Crystallographic Communications</dc:relation><dc:rights>info:eu-repo/semantics/openAccess</dc:rights><dc:type>info:eu-repo/semantics/article</dc:type><dc:identifier>https://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/12412</dc:identifier></oai_dc:dc></metadata></record></GetRecord></OAI-PMH>