Synonyms: 81617-85-8;AC1L4IWQ;bis{11,12-dihydroxy-21-methoxy-15-[(3-methylbut-2-enoyl)oxy]-2,16,21-trioxo-13,20-epoxypicras-3-en-3-yl} pentanedioate;Picras-3-en-21-oic acid, 3,3'-((1,5-dioxo-1,5-pentenediyl)bis(oxy))bis(13,20-epoxy-11,12-dihydroxy-15-((3-methyl-1-oxo-2-butenyl)oxy)-2,16-dioxo-, dimethyl ester, (11beta,12alpha,15beta)-(11'beta,12'alpha,15'beta)-