2-Butenoic acid, 2-((acetyloxy)methyl)-4-hydroxy-, (3aR,4R,6E,9S,10Z,11aR)-9-(acetyloxy)-2,3,3a,4,5,8,9,11a-octahydro-6,10-dimethyl-3-methylene-2-oxocyclodeca(b)furan-4-yl ester, (2E)- 75351-98-3