Synonyms: Picras-2-en-21-oicacid,15-[(3,4-dimethyl-1-oxo-2-pentenyl)oxy]-13,20-epoxy-2,11,12-trihydroxy-1,16-dioxo-,methyl ester, [11b,12a,15b(E)]-;2H-3,11c-(Epoxymethano)phenanthro[10,1-bc]pyran, picras-2-en-21-oic acidderiv.; Bruceanol F; Yadanzioside N aglycone