stizolicin

(E)-4-Hydroxy-2-(hydroxymethyl)-2-butenoic acid (1aR,4E,7S,7aR,10aS,10bR)-1a,2,3,6,7,7a,8,9,10a,10b-decahydro-1a,5-dimethyl-8-methylene-9-oxooxireno[9,10]cyclodeca[1,2-b]furan-7-yl ester