79439-85-3 Bruceantinoside A Bruceantinoside-A NSC 333530 Picras-1-en-21-oic acid, 15-((3,4-dimethyl-1-oxo-2-pentenyl)oxy)-13,20-epoxy-2-(beta-D-glucopyranosyloxy)-11,12-dihydroxy-3,16-dioxo-, methyl ester, (11beta,12alpha,15beta(E))-