eupatoriopicrine

(3aR,6E,10E,11aR)-3a,4,5,8,9,11a-Hexahydro-3-methylene-6,10-dimethyl-4α-[(E)-4-hydroxy-2-(hydroxymethyl)-2-butenoyloxy]cyclodeca[b]furan-2(3H)-one

(E)-4-Hydroxy-2-hydroxymethyl-2-butenoic acid (3aR,4R,6E,10E,11aR)-2,3,3a,4,5,8,9,11a-octahydro-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-yl ester