NSC676775 Olean-12-en-28-oic acid, 3-.beta.-[2-O-(.beta.-D-glucopyranosyl)- .beta.-D-glucopyranosyloxy]-, [2-O-[[4-O-[3-O-(.beta.-L-arabinopyranosyl)- .beta.-D-xylopyranosyl]-3-O-.beta.-D-xylopyranosyl]- 6-deoxy-D-gulopyranosyl]-.beta.-L-arabinopyranosyl] ester