Marine natural products. VIII. Bioactive triterpene-oligoglycosides from the sea cucumber Holothuria leucospilota Brandt (2). Structure of holothurin A.
作者:ISAO KITAGAWA、TAKAO NISHINO、MOTOMASA KOBAYASHI、YOSHIMASA KYOGOKU
DOI:10.1248/cpb.29.1951
日期:——
The chemical structure of holothurin A, the major lanostane-type triterpene oligoglycoside from the Cuvierian tubules of the sea cucumber Holothuria leucospilota BRANDT (=H. vagabunda SELENKA), has been elucidated to be 3-O-[β-D-3-O-methylglucopyranosyl-(1→3)-β-D-glucopyranosyl (1→4)-β-D-quinovopyranosyl (1→2)-β-D-xylopyranosyl]-holothurigenol 4'-O-sodium sulfate (8), on the basis of chemical, physicochemical, and biochemical evidence. Holothurin A (8) corresponds to the 4"-O-[3'''-O-(β-D-3''''-O-methyl-glucopyranosyl)-β-D-glucopyranoside] of holothurin B (6), which is the major oligoglycoside of the body walls of the same sea cucumber.
海参Holothuria leucospilota BRANDT (=H. vagabunda SELENKA)的Cuvierian管中的主要羊毛甾烷型三萜寡糖苷holothurin A的化学结构已被阐明为3-O-[β-D-3-O-甲基葡萄糖吡喃糖苷-(1→3)-β-D-葡萄糖吡喃糖苷(1→4)-β-D-奎诺糖吡喃糖苷(1→2)-β-D-木糖吡喃糖苷]-holothurigenol 4'-O-硫酸钠(8),这一结论基于化学、物理化学和生物化学证据。Holothurin A (8)对应于holothurin B (6)的4"-O-[3'''-O-(β-D-3''''-O-甲基-葡萄糖吡喃糖苷)-β-D-葡萄糖苷],后者是同一种海参体壁中的主要寡糖苷。