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

(4aR,5R,10aR)-8-Benzyl-5-methoxycarbonyloxy-9-oxo-3,4,4a,5,6,8,9,10-octahydro-pyrrolo[2,3-i]isoquinoline-2-carboxylic acid methyl ester

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

N-Benzyl-2-((4aR,5R,8aR)-2-benzyl-5-hydroxy-8-oxo-octahydro-isoquinolin-8a-yl)-N-(4-methoxy-benzyl)-acetamide

N-[(1S,5S,6R)-5-[(tert-butyldimethylsilyl)oxy]-2-oxo-7-oxabicyclo[4.1.0]hept-3-en-3-yl]acetamide