Lycopodium triterpenoids. 11. The structures of inundoside-A,-B,-C,-D1,-D2,-E,-F, and -G, triterpenoid-glycosides occurring in Lycopodium inundatum L.
作者:YOSHISUKE TSUDA、MIYUKI KANEDA、NAOMI YASUFUKU、YUKIKO SHIMIZU
DOI:10.1248/cpb.29.2123
日期:——
From Lycopodium inundatum, Lycopodiaceae, seven new triterpenoid-glycosides (inundoside-A, -B, -D1, -D2, -E, -F, and -G) were isolated together with α-onocerin and serratenediol. Their structures were elucidated as serratenediol 3-α-L-arabinopyranoside (A), its 21-acetate (B), its 4'-O-p-coumaroyl ester (D1), its 21-O-acetyl and 4'-O-p-coumaroyl ester (D2), 21-episerratenediol 3-α-L-arabinopyranoside (E), and its 4'-O-p-coumaroyl ester (F) by chemical and spectroscopic means. The previously reported tohogenolglycoside (inundoside-C) thus must by tohogenol 3-α-L-arabinopyranoside. The other glycoside, inundoside-G, obtained only as a tetraacetate, is suggested to be serratenediol 3-α-L-arabinopyranoside 2'-or 3'-O-p-coumaroyl ester on the basis of spectroscopic evidence.
从茄科植物 Lycopodium inundatum 中分离出七种新的三萜糖苷(inundoside-A、-B、-D1、-D2、-E、-F 和 -G)以及 α-onocerin 和 serratenediol。通过化学和光谱手段,阐明了它们的结构,即丝裂原二醇 3-α-L-arabinopyranoside (A)、其 21-乙酸酯 (B)、其 4'-O-p-coumaroyl 酯 (D1)、其 21-O-acetyl 和 4'-O-p-coumaroyl 酯 (D2)、21-表丝裂原二醇 3-α-L-arabinopyranoside (E) 和其 4'-O-p-coumaroyl 酯 (F)。因此,以前报告的高原醇糖苷(inundoside-C)必须是由高原醇 3-α-L-arabinopyranoside 组成的。另一种苷(inundoside-G)仅以四乙酸酯的形式获得,根据光谱证据,它可能是丝裂原醇 3-α-L-arabinopyranoside 2'-or 3'-O-p-coumaroyl 酯。