酸浆
绝对构型
氢键
化学
含烷醇
茄科
立体化学
类固醇
双键
植物
分子
生物
有机化学
生物化学
医学
基因
病理
激素
替代医学
索马里风
作者
R. Ya. Okmanov,Markhaboxon Makhmudova,I. D. Bobaev,B. Tashkhodzhaev
标识
DOI:10.1107/s205698902100709x
摘要
The compounds (17S,20R,22R,24R,25S)-5β,6β:20,24-diep-oxy-4β,25-dihy-droxy-1-oxowith-2-en-26,22-olide and (20R,22R)-5α,14α,20-Trihy-droxy-1-oxo-6α,7α-ep-oxy-witha-2-enolide were isolated from a chloro-form extract of the aerial parts of Physalis angulata L. (Solanaceae). Two products were isolated from the chromatographic separation extract. Compound I corresponds to physangulide B chloro-form monosolvate, C28H38O7·CHCl3, while compound II is 14α-hy-droxy-ixocarpanolide, C28H40O7. In the two mol-ecular structures, the conformation of the steroid part (rings A, B, C, D) does not differ. In both crystals, mol-ecules are linked by inter-molecular O-H⋯O hydrogen bonds along the c-axis direction and form a two-dimensional network parallel to the ac plane. The absolute configuration was determined from X-ray diffraction data.
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