(4aS,7S)-4a-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1,1,7-trimethyl-2,3,4,4a,5,6,7,8-octahydro-1H-benzocyclohepten-7-ol

Acetic acid (4aR,7R)-1,1,7-trimethyl-4a-(2-oxo-ethyl)-2,3,4,4a,5,6,7,8-octahydro-1H-benzocyclohepten-7-yl ester

Acetic acid (4aS,7S)-4a-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-1,1,7-trimethyl-2,3,4,4a,5,6,7,8-octahydro-1H-benzocyclohepten-7-yl ester