25514-30-1

Picras-3-en-21-oic acid, 13, 20-epoxy-3,11,12-trihydroxy-15-[ (4-hydro xy-3, 4-dimethyl-1-oxo-2-pentenyl)oxy]-2,16-dioxo-, methyl ester, [11. beta.,12.alpha.,15.beta.(E)]-