Studies on Nepalese Crude Drugs. XXIII. On the Diterpenoid Constituents of the Aerial Parts of Scutellaria grossa WALL.
作者:Akiko OHNO、Haruhisa KIZU、Tsuyoshi TOMIMORI
DOI:10.1248/cpb.45.1097
日期:——
From the aerial parts of Scutellaria grossa, a new neoclerodane diterpene named scutegrossin A has been isolated together with five known neoclerodane diterpenes, jodrellin B, scutecolumnin A, scutalsin, scutecyprol B and scutalbin B.The strucure of a new compound has been determined by spectroscopic and chemical methods as (11S, 13S, 16S, 19R)-6α-O-acetyl-19-O-[(E)-2-methyl-2-butenoyl]-2α, 19;4α, 18;11, 16;15, 16-tetraepoxy-14-neoclerodene-6, 19-diol.In addition, the absolute stereochemistry of 2-methylbutanoyl group of scutecolumnin A and scutalbin B has been ascertained to be the S form.
从毛黄芩的气生部分中分离出了一种新的新黄烷二萜,名为毛黄芩苷 A,同时还分离出了五种已知的新黄烷二萜,即毛黄芩苷 B、毛黄芩苷 A、毛黄芩苷、毛黄芩醇 B 和毛黄芩素 B。通过光谱和化学方法确定了一种新化合物的结构,即 (11S, 13S, 16S, 19R)-6α-O-乙酰基-19-O-[(E)-2-甲基-2-丁烯酰]-2α, 19;4α, 18;11, 16;15, 16-四环氧-14-新柠檬二烯-6, 19-二醇。此外,还确定了黄芩素 A 和黄芩素 B 的 2-甲基丁酰基的绝对立体化学结构为 S 形式。