2-Propenoic acid, 2-methyl-, (3aS,4S,5R,6R,8Z,10R,11aR)-2,3,3a,4,5,6,7,10,11,11a-decahydro-6-hydroxy-6,10-dimethyl-3-methylene-2,7-dioxocyclodeca(b)furan-4,5-diyl ester 75628-10-3