72502-84-2 Propanoic acid, 2-methyl-, (3aR,4R,6S,9R,10Z,11aR)-2,3,3a,4,5,6,7,8,9,11a-decahydro-9-hydroxy-6,10-dimethyl-3-methylene-2-oxo-6,9-epoxycyclodeca(b)furan-4-yl ester