(3aS,4R,4aS,7aR,8aR)-7a-(1-Methoxy-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,8aR)-2,2-Diethyl-6,6-dimethyl-8-oxo-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxole-3a-carboxylic acid methyl ester

(3aR,4aR,7aS,8R,8aS)-2,2-Diethyl-8-hydroxy-6,6-dimethyl-tetrahydro-benzo[1,2-d;4,5-d']bis[1,3]dioxole-3a-carboxylic acid methyl ester

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

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