摘要
甜叶悬钩子(Rubus suavissimus S.Lee)叶的主要甜味成分为甜叶悬钩子甙(ru-busoside),干叶含量达5%,甜度为蔗糖的114倍。我们曾研究了甜叶悬钩子果实的成分。不少甜味成分是与化学结构相近的苦味成分混在一起。本文研究甜叶悬钩子叶中的苦味组分,试图从中分离甜味成分,发现新的甜味化合物。经分离获得了一个苦味成分和一个新甜味成分,其含量分别为0.01%,0.006%,按分离的顺序苦味成分暂称 S-9-
From leaves of Rubus suavissimus,two minor ent-kaurane type diterpene glucosides were isolated in addition to the major sweet principle,rubusoside.The bitter glycoside was identi- fied as sugeroside which has been isolated from leaves of Ilex sugerokii var.brevipedunculata etc.The new glucoside named suavioside-A has a sweet taste and the structure was elucidated as 3α,16β 17-trihydroxy-ent-kaurane-17-0-β-D-glucopyranoside.
关键词
甜叶悬钩子
二萜甜试
Rubus suavissimus
Sweet diterpene glucoside
Ent-kaurane
Suavioside-A
Sugeroside
