methyl (4aS,6aR,12aS,12bS)-6a-hydroxy-11-methoxy-4a,12a-dimethyl-1,2,3,4a,5,6,6a,12,12a,12b-decahydrospiro[benzo[a]xanthene-4,2'-[1,3]dioxolane]-9-carboxylate

(4a'S,5'S,8a'S)-5'-(2-bromo-3-(tert-butoxy)-5-ethoxybenzyl)-5',8a'-dimethylhexahydro-2'H-spiro[[1,3]dioxolane-2,1'-naphthalen]-6'(7'H)-one

(-)-2-(furan-3-yl)-5-[2-(1,2,4a-trimethyl-5-methylene-decahydronaphthalen-1-yl)-ethyl]-3,6-dihydro-2H-pyran

(4aS,5S,8aS)-5-allyl-5,8a-dimethyl-3,4,4a,8a-tetrahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-6(5H)-one

(4aS,5S,8S,8aS)-(+)-3,4,4a,7,8,8a-hexahydro-5,8a-dimethyl-5-(2-propenyl)-8-trimethylsilylnaphthalene-1,6(2H,5H)-dione 1-(ethylene acetal)