(3R,4S)-1,4-diphenyl-3-<3-(methoxycarbonyl)propionamido>-2-azetidinone

Acetic acid 5-oxo-1-((3R,4S)-2-oxo-1,4-diphenyl-azetidin-3-yl)-pyrrolidin-2-yl ester

2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-phenylpropanoic acid