(2aS,3R,4aR,5S,6R,7R,7aS,7bR)-7-Hydroxy-6-isopropenyl-7b-methyl-2-oxo-2a,3,4a-tris-trimethylsilanyloxy-decahydro-indeno[7,1-bc]furan-5-carboxylic acid methyl ester

(5R,6R)-6-(hydroxymethyl)-2-methyl-5-(1-methylethenyl)-2-cyclohexen-1-one

(5R,6R)-6-[(1,1-dimethylethyl)dimethylsilyloxymethyl]-2-methyl-5-(1-methylethenyl)-2-cyclohexen-1-one

(2aS,3R,4aR,5S,6R,7R,7aS,7bR)-7-Acetoxy-4a-hydroxy-6-isopropenyl-7b-methyl-2-oxo-2a,3-bis-trimethylsilanyloxy-decahydro-indeno[7,1-bc]furan-5-carboxylic acid methyl ester