[(3aS,4aR,7aR,8R,8aS)-8-(tert-Butyl-dimethyl-silanyloxy)-2,2-diethyl-6,6-dimethyl-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxol-3a-yl]-methanol

(3aS,4R,4aS,7aR,8aR)-7a-(1-Hydroxy-1-methyl-ethyl)-2,2,6,6-tetramethyl-hexahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxol-4-ol

[(3aR,4aR,7aR,8R,8aS)-8-(tert-Butyl-dimethyl-silanyloxy)-2,2,6,6-tetramethyl-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxol-3a-yl]-diphenyl-methanol

(3aR,4aR,7aR,8aR)-7a-(1-Methoxy-1-methyl-ethyl)-2,2,6,6-tetramethyl-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxol-4-one

(3aR,4aR,7aR,8aR)-7a-(1-Hydroxy-1-methyl-ethyl)-2,2,6,6-tetramethyl-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxol-4-one