(4aR,5S,6S,8aR)-5-allyl-5,8a-dimethyl-6-triethylsiloxy-3,4,4a,5,6,7,8,8a-octahydronaphthalene-2-carbaldehyde

3-{(1R,4aR,5S,6S,8aR)-5-[(R)-2-hydroxy-4-methylpent-3-enyl]-5,8a-dimethyl-2-methylene-6-(hydroxy)decahydronaphthalen-1-yl}methyl-2-methoxy-5,6-dimethyl-4H-pyran-4-one

3-{(1R,4aR,5S,6S,8aR)-5-[(R)-2-hydroxy-4-methylpent-3-enyl]-5,8a-dimethyl-2-methylene-6-(triethylsiloxy)decahydronaphthalen-1-yl}methyl-2-methoxy-5,6-dimethyl-4H-pyran-4-one