Studies on the constituents of Swertia japonica Makino II. On the structures of new glycosides

Abstract

Two new secoiridoid glycosides, swertiajaposide A (1) and swertiajaposide B (2), a new unsaturated alcohol glycoside, 3-butenyl 6′-O-α-L- arabinopyranosyl-β-D-glucopyranoside (3), and a new lignan glycoside, 7R,7′R,8S,8′S-(+)-neo-olivil-4-O-β-D-glucopyranoside (4), were isolated together with six known compounds from the whole plants of Swertia japonica MAKING. The structures of the new compounds were elucidated on the basis of chemical and spectroscopic evidence. ©2005 Pharmaceutical Society of Japan.