Lycopodium triterpenoids. 11. The structures of inundoside-A,-B,-C,-D1,-D2,-E,-F, and -G, triterpenoid-glycosides occurring in Lycopodium inundatum L.

摘要: From Lycopodium inundatum, Lycopodiaceae, seven new triterpenoid-glycosides (inundoside-A, -B, -D1, -D2, -E, -F, and -G) were isolated together with α-onocerin serratenediol. Their structures elucidated as serratenediol 3-α-L-arabinopyranoside (A), its 21-acetate (B), 4'-O-p-coumaroyl ester (D1), 21-O-acetyl (D2), 21-episerratenediol (E), (F) by chemical spectroscopic means. The previously reported tohogenolglycoside (inundoside-C) thus must tohogenol 3-α-L-arabinopyranoside. other glycoside, inundoside-G, obtained only a tetraacetate, is suggested to be 2'-or 3'-O-p-coumaroyl on the basis of evidence.