(1S,7aR)-1-(tert-Butyl-diphenyl-silanyloxymethyl)-7a-methyl-1,2,3,6,7,7a-hexahydro-inden-5-one

(R)-2-Acetoxy-3-[(1R,2S)-2-(tert-butyl-diphenyl-silanyloxymethyl)-1-methyl-5-oxo-cyclopentyl]-propionic acid

Acetic acid (R)-2-[(1R,2S)-2-(tert-butyl-diphenyl-silanyloxymethyl)-1-methyl-5-oxo-cyclopentyl]-1-ethylsulfanylcarbonyl-ethyl ester