5-[(1R,4R)-4-(tert-Butyl-dimethyl-silanyloxy)-cyclohex-2-enyl]-1-(4-methoxy-benzyloxy)-2-oxo-1,2-dihydro-pyridine-3-carboxylic acid ethyl ester

N-{(S)-2-[(1R,4R)-4-(tert-Butyl-dimethyl-silanyloxy)-cyclohex-2-enyl]-3-hydroxy-propyl}-N-(4-methoxy-benzyloxy)-malonamic acid ethyl ester

5-[(1R,4R)-4-(tert-Butyl-dimethyl-silanyloxy)-cyclohex-2-enyl]-4-hydroxy-1-(4-methoxy-benzyloxy)-2-oxo-1,2,5,6-tetrahydro-pyridine-3-carboxylic acid ethyl ester

5-[(1R,4R)-4-(tert-Butyl-dimethyl-silanyloxy)-cyclohex-2-enyl]-3-((1S,2S,4aR,6S,8aS)-2,6-dimethyl-1,2,4a,5,6,7,8,8a-octahydro-naphthalene-1-carbonyl)-4-hydroxy-1H-pyridin-2-one

N-{(S)-2-[(1R,4R)-4-(tert-Butyl-dimethyl-silanyloxy)-cyclohex-2-enyl]-3-hydroxy-propyl}-3-cyclohexyl-N-(4-methoxy-benzyloxy)-3-oxo-propionamide