(3aR,3bS,4S,6aS)-(-)-3,3a,3b,4,5,6,6a,7-octahydro-4-hydroxy-3a,5,5-trimethylcyclopenta<4.5>pentalen-2-one

Acetic acid (3S,3aS,3bR,7aR)-2,2,3b-trimethyl-7-oxo-2,3,3a,3b,4,5,7,7a-octahydro-1H-cyclopenta[a]pentalen-3-yl ester

Benzoic acid (3S,3aS,3bR,7aR)-2,2,3b-trimethyl-7-oxo-2,3,3a,3b,4,5,7,7a-octahydro-1H-cyclopenta[a]pentalen-3-yl ester

Benzoic acid (3S,3aS,3bR,7S,7aR)-7-acetoxy-2,2,3b-trimethyl-2,3,3a,3b,4,5,7,7a-octahydro-1H-cyclopenta[a]pentalen-3-yl ester