(22Z,24S)-Stigmasta-5,22,25-trien-3β-ol and other novel sterols from Clerodendrum scandens: first report of the isolation of a cis-Δ<sup>22</sup>-unsaturated sterol from a higher plant
作者:Toshihiro Akihisa、Toshitake Tamura、Taro Matsumoto、W. C. M. C. Kokke、Parthasarathi Ghosh、Swapnadip Thakur
DOI:10.1039/p19900002213
日期:——
(22Z,24S)-Stigmasta-5,22,25-trien-3β-ol was isolated from Clerodendrum scandens(Verbenaceae). It is only the second example of a naturally occurring Z-Δ22-unsaturated sterol. Four other novel sterols were isolated from the same source, viz.(24S)-5α-stigmast-25-en-3β-ol, (22E,24S)-5α-stigmasta-22,25-dien-3β-ol, 24-methylergosta-5,25-dien-3β-ol, and (24S)-14α-methyl-5α-stigmasta-9(11),25-dien-3β-ol.
(22 Z,24 S)-Stigmasta-5,22,25-trien-3β-ol从Clerodendrum scandens(Verbenaceae)分离得到。它仅仅是一个天然存在的第二例Ž -Δ 22不饱和甾醇。从同一来源分离出另外四种新型固醇,即。(24 S)-5α-stigmast-25-en-3β-ol,(22 E,24 S)-5α-stigmasta-22,25-dien-3β-ol,24-methylergosta-5,25-dien-3β -ol和(24 S)-14α-甲基-5α-stigmasta-9(11),25-dien-3β-ol。所有结构均通过化学和光谱法确定。