(1S,3R,4S,4aR,8R,8aS)-4-(2S,3aR,6aS)-Hexahydro-furo[2,3-b]furan-2-yl-8a-hydroxymethyl-3,4-dimethyl-8-vinyl-decahydro-naphthalen-1-ol

(1S,3R,4S,4aS,8R,8aS,2'S,3a'R,6a'S)-acetic acid 1-acetoxydecahydro-4-(hexahydrofuro[2,3-b]furan-2'-yl)-3,4-dimethyl-8-vinylnaphthalen-8a-ylmethyl ester

(3R,4S,4aS,8R,8aS,2'S,3a'R,6a'S)-8a-(tert-butyldimethylsilanyloxymethyl)-4-(hexahydrofuro[2,3-b]furan-2'-yl)-3,4-dimethyloctahydro-8-vinylnaphthalen-1-one