STUDIES ON IRIDOID GLYCOSIDES FROM SWERTIA ANGUSTIFOLIA

Five secoiridoid glycosides were isolated from Swertia angustifolia Buch. -Ham. ex D. Don, The structures of two new compounds , angustiamarin (I)and angustioside (II) with three known compounds sweroside (Ⅲ), swertiamarin (Ⅳ)and epi-eustomoside (Ⅴ)were elucidated by means of spectroscopic and chemicalmethods.