2 NEW HOPANE-TRITERPENE GLYCOSIDES FROM A FERN, DIPLAZIUM-SUBSINUATUM(WALL EX HOOK ET GREV) TAGAWA

From a whole plant of a fern, Diplazium subsinuatum (WALL. ex HOOK. et GREV.) TAGAWA, two new hopane-triterpene glycosides termed diplaziosi des I and II were isolated together with a known hopane-triterpene gly coside named glycoside C (1). The structures of diplaziosides I and II were established as yl(1-->6)]-beta-D-glucopyranosyl-hopan-28,22-olid e (2) and ta-D-glucopyranosyl-28,22-carbonyloxy-hopan-30-oic acid (3), respectively, on the basis of spectral evidence. In addition, the ful l H-1- and C-13-NMR assignments for known 1 are also reported for the first time.