(8S,8aR)-3,8-Dimethyl-2,5,6,7,8,8a-hexahydro-1H-azulen-4-one

(3S,4S)-4-Methyl-3-(3-oxo-butyl)-cycloheptanone

(3S,4S)-3-<2-(ethoxycarbonyl)ethyl>-4-methylcycloheptanone