Synonyms: Picrasan-21-oicacid,15-[(3,4-dimethyl-1-oxo-2-pentenyl)oxy]-13,20-epoxy-1,11,12-trihydroxy-2,16-dioxo-,methyl ester, [1b,11b,12a,15b(E)]-; 2H-3,11c-(Epoxymethano)phenanthro[10,1-bc]pyran, picrasan-21-oicacid deriv.; (+)-Bruceanol E; Bruceanol E