3-((1S,2S)-2-Methyl-6-oxo-cycloheptyl)-propionic acid

(1S,5S,6S,8S,9R)-8-(tert-butyldimethylsiloxy)-5,9-dimethylbicyclo<4.3.0>nonan-2-one

(1S,6S,7S,9S,10R)-9-(tert-butyldimethylsiloxy)-6,10-dimethylbicyclo<5.3.0>decan-2-one

(4S,6S)-4-methyl-6-trimethylsilyl-2-cycloheptenone

3-((1R,2S)-2-Methyl-6-oxo-cyclohept-4-enyl)-propionic acid ethyl ester