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-1-(4-methoxy-benzyloxy)-1H-pyridin-2-one

5-[(1S,2R,5S,6R)-2,5-Bis-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-2-yl]-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

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-1-(4-methoxy-benzyloxy)-5,6-dihydro-1H-pyridin-2-one