Studies on the Constituents of Scutellaria Species. XVIII. Structures of Neoclerodane-Type Diterpenoids from the Whole Herb of Scutellaria rivularis WALL.
作者:Haruhisa KIZU、Yoshitaka IMOTO、Tsuyoshi TOMIMORI、Tohru KIKUCHI、Shigetoshi KADOTA、Koji TSUBONO
DOI:10.1248/cpb.45.152
日期:——
Five neoclerodane-type diterpenoid lactones, scuterivulactones A, B, C1, C2 and D, have been isolated (scuterivulactone C2 was separated as the acetate) from the whole herb of Scutellaria rivularis WALL. (Labiaceae), and their structures have been determined based on chemical and physicochemical evidence as follows : scuterivulactone A, (4S, 11S)-11-acetoxy-6α-benzoyloxy-3, 4-epoxy-8β-hydroxy-13(14)-neocleroden-15, 16-olide; scuterivulactone B, (4R, 13R)-11β-acetoxy-6α-benzoyloxy-8β, 13-epoxy-3-oxo-15, 16-neoclerodanolide; scuterivulactone C1, (4R, 13R)-11β-acetoxy-6α-benzoyloxy-3α, 4β-dihydroxy-8β, 13-epoxy-15, 16-neoclerodanolide; scuterivulactone C2, (4R*, 13S*)-11β-acetoxy-6α-benzoyloxy-3α, 4β-dihydroxy-8β, 13-epoxy-15, 16-neoclerodanolide; and scuterivulactone D, (4R)-6α-benzoyloxy-3α, 4β-dihydroxy-11, 13(14)-neoclerodadien-15, 16-olide.
从黄芩全草中分离得到五种新环丹型二萜内酯:黄芩内酯 A、B、C1、C2 和 D(黄芩内酯 C2 以乙酸盐形式分离)。 (唇形科),其结构已根据化学和物理化学证据确定如下: scuterivulactone A,(4S,11S)-11-乙酰氧基-6α-苯甲酰氧基-3,4-环氧-8β-羟基-13(14) [0101] -neocleroden-15, 16-内酯; scuterivulactone B, (4R, 13R)-11β-乙酰氧基-6α-苯甲酰氧基-8β, 13-环氧-3-oxo-15, 16-neoclerodanolide; [0090] 盾草内酯C1,(4R,13R)-11β-乙酰氧基-6α-苯甲酰氧基-3α,4β-二羟基-8β,13-环氧-15,16-新克罗丹内酯;盾草内酯 C2, (4R*, 13S*)-11β-乙酰氧基-6α-苯甲酰氧基-3α, 4β-二羟基-8β, 13-环氧-15, 16-neoclerodanolide;和scuterivulactone D, (4R)-6α-苯甲酰氧基-3α, 4β-二羟基-11, 13(14)-neoclerodadien-15, 16-olide。