114586-21-9 Bruceanol C Picras-3-en-21-oic acid, 15-((4-(acetyloxy)-3,4-dimethyl-1-oxo-2-pentenyl)oxy)-13,20-epoxy-1,11,12-trihydroxy-2,16-dioxo-, methyl ester, (1beta,11beta,12alpha,15beta(E))-