Lignans of Trachelospermum asiaticum var. intermedium. III. Isolation of a New Lignan Glycoside, Arctigenin-4'-β-gentiobioside

A new lignan glycoside was isolated from the stems of Trachelospermum asiaticum NAKAI var. intermedium NAKAI (Apocynaceae) and its structure has been determined as 4'-hydroxy-3, 3', 4-trimethoxy-lignan-olid (9, 9')-4'-(6-O-β-D-glucopyranosyl)-β-D-glucopyranoside (=arctigenin-4/-β-gentiobioside)(V), which is a sole example of naturally occuring of lignan having glucosyl glucose moiety.