Synonyms: Picras-1-en-21-oicacid, 15-[(3,4-dimethyl-1-oxo-2-pentenyl)oxy]-13,20-epoxy-2-(b-D-glucopyranosyloxy)-11,12-dihydroxy-3,16-dioxo-,methyl ester, [11b,12a,15b(E)]-;2H-3,11c-(Epoxymethano)phenanthro[10,1-bc]pyran, picras-1-en-21-oic acidderiv.; Bruceantinoside A; NSC 333530