112899-35-1 Bruceantinoside C Picras-2-en-21-oic acid, 15-((4-(acetyloxy)-3,4-dimethyl-1-oxo-2-pentenyl)oxy)-13,20-epoxy-2-(beta-D-glucopyranosyloxy)-11,12-dihydroxy-1,16-dioxo-, methyl ester, (11beta,12alpha,15beta(E))-