(3R,4S,5R)-5-allyl-3,4-(isopropylidenedioxy)cyclohexanone

(4S,5R)-5-allyl-4-(tert-butyldimethylsiloxy)cyclohex-2-enone

(4S,5R)-4,5-O-isopropylidenedioxycyclohex-2-en-1-one

2-[(1R,2R,3R)-2-Allyl-3-(tert-butyl-dimethyl-silanyloxy)-6-oxo-cyclohexyl]-N-benzyl-N-(4-methoxy-benzyl)-acetamide

N-Benzyl-2-[(1R,2R,3R)-3-(tert-butyl-dimethyl-silanyloxy)-6-oxo-2-(2-oxo-ethyl)-cyclohexyl]-N-(4-methoxy-benzyl)-acetamide