A pentacyclic triterpene from Maytenus imbricata: structure elucidation by X-ray crystallography

被引：0
作者：
Alécio Antonio Pimenta
Sílvia Ribeiro de Souza e Silva
Grácia Divina de Fátima Silva
Luiz Cláudio de Almeida Barbosa
Javier Ellena
Antonio Carlos Doriguetto
机构：
[1] Instituto de Física de São Carlos– USP,NEPLAM
[2] Universidade Federal de Minas Gerais,Departamento de Química
[3] Universidade Federal de Viçosa,Departamento de Química
[4] Universidade Federal de Alfenas – UNIFAL-MG,undefined
来源：
Structural Chemistry | 2006年 / 17卷
关键词：
Pentacyclic triterpene; Crystal structure; Intermolecular geometry;
D O I：
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学科分类号：
摘要：
A pentacyclic triterpene, 3β,30-dihydroxy-lup-20(29)-ene, was isolated from the powder extract of Maytenus imbricata. The structure and stereochemistry of the compound were established by spectroscopic techniques and unambiguously determined by single crystal X-ray crystallography. The crystal structure shows one molecule in the asymmetric unit. The crystal packing is stabilized by O–H···O intermolecular hydrogen bonds, which give rise to infinite helical chains along the c unit cell axis. The intra-molecular geometry was analyzed using MOGUL, a knowledge base of molecular geometry derived from the Cambridge Structural Database (CSD).
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页码：149 / 153
页数：4
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