2-Methyl-2-hydroxy-6α,10,10-trimethyl-1α,9α-aethylen-bicyclo[4.3.0]nonan

5α-hydroxy-15-norpanasinsan-8-one

2-Oxo-5-aethoxycarbonyloxy-6α,10,10-trimethyl-1α,9α-aethylen-bicyclo(4.3.0)nonan

(2aR,4aS,8aR)-2,2,4a-trimethyloctahydrocyclobuta[c]inden-8(1H)-one