3-[(1R,4aR,5S,6R,8aR)-5,8a-dimethyl-2-methylene-5-(3-oxopropyl)-6-(triethylsilyloxy)decahydronaphthalen-1-yl]-methyl-2-methoxy-5,6-dimethyl-4H-pyran-4-one

3-[(1R,4aR,5S,6R,8aR)-5-(3-tert-butyldimethylsilyloxypropyl)-5,8a-dimethyl-2-methylene-6-(triethylsilyloxy)decahydronaphthalen-1-yl]methyl-2-methoxy-5,6-dimethyl-4H-pyran-4-one

3-[(1R,4aR,5S,6S,8aS)-6-(tert-butyldimethylsiloxy)-5,8a-dimethyl-2-methylene-5-(4-methylpent-3-enyl)-decahydronaphthalen-1-yl]hydroxymethyl-5,6-dimethyl-2-methoxy-4H-pyran-4-one

3-((R)-((2S,3aS,5aS,6R,9aR,9bS)-5a,9b-dimethyl-7-methylene-2-vinyldodecahydronaphtho[2,1-b]furan-6-yl)(hydroxy)methyl)-2-methoxy-5,6-dimethyl-4H-pyran-4-one

3-[[(4aR,6aR,7R,10aR,10bR)-3-hydroxy-6a,10b-dimethyl-8-(methylene)dodecahydro-1H-benzo[f]chromen-7-yl]-methyl]-2-methoxy-5,6-dimethyl-4H-pyran-4-one