Marine natural products. VII. Bioactive triterpene-oligoglycosides from the sea cucumber Holothuria leucospilota Brandt (1). Structure of holothurin B.
作者:ISAO KITAGAWA、TAKAO NISHINO、MOTOMASA KOBAYASHI、TAKAO MATSUNO、HIDEO AKUTSU、YOSHIMASA KYOGOKU
DOI:10.1248/cpb.29.1942
日期:——
Two lanostane-type triterpene oligoglycosides designated as holothurin A and holothurin B were isolated from the sea cucumber Holothuria leucospilota BRANDT (=H. vagabnda SELENKA). The chemical structure of holothurin B, which is contained mainly in the body walls, has been established as 3-O-(2'-O-β-D-quinovopyranosyl-β-D-xylopyranosyl)-holothurigenol 4'-O-sodium sulfate (6), on the basis of chemical, physicochemical, and biochemical evidence. The genuine aglycone of holothurin B was designated as holothurigenol (2) and the C-20 and C-22 configurations of 2 and the artifact aglycone 22, 25-oxidoholothurinogenin (1) have been elucidated as S.
从海参 Holothuria leucospilota BRANDT(=H. vagabnda SELENKA)中分离出两种羊毛甾烷型三萜类低聚糖苷,分别命名为 holothurin A 和 holothurin B。根据化学、物理化学和生物化学证据,已确定主要含在体壁中的冬青皂苷 B 的化学结构为 3-O-(2'-O-β-D-喹诺酮吡喃糖基-β-D-吡喃木糖基)-冬青皂苷-4'-O-硫酸钠(6)。冬凌草苷 B 的真正苷元被命名为冬凌草苷元醇(2),而 2 的 C-20 和 C-22 构型以及人工苷元 22,25-oxidoholothurinogenin(1)已被阐明为 S。