1087712-85-3 (2R,3R)-2-(3,4-Dimethoxy-phenyl)-1-(2-methoxy-ethyl)-5-oxo-pyrrolidine-3-carboxylic acid
1018332-23-4 (2R,4S)-1-(tert-butoxy)carbonyl-4-({(9H-fluoren-9-yl)methoxycarbonyl}amino)pyrrolidine-2-carboxylic acid