2-Butenoic acid, 2-methyl-, 4,4a,5,6,7,8,8a,9-octahydro-9-hydroxy-3,4a,5-trimethylnaphtho(2,3-b)furan-7-yl ester, (4aR-(4aalpha,5alpha,7alpha(Z),8aalpha,9alpha))- 4,4a,5,6,7,8,8a,9-Octahydro-9-hydroxy-3,4a,5-trimethylnaphtho(2,3-b)furan-7-yl 2-methyl-2-butenoate (4aR-(4aalpha,5alpha,7alpha(Z),8aalpha,9alpha))- 6902-62-1 Crotonic acid, 2-methyl-, 4,4a,5,6,7beta,8,8abeta,9-octahydro-9alpha-hydroxy-3,4abeta,5beta-trimethylnaphtho(2,3-b)furan-7-yl ester, (Z)-