methyl ester of N-tert-butyloxycarbonyl-L-aspartyl-L-phenylalanine

<(4S)-2,2-bis(trifluoromethyl)-5-oxo-1,3-oxazolidine-4-yl>acetate

Boc-Asp(OBzl)-Phe-OMe

(2S)-methyl 2-(5-chloro-5-cyano-2-((R)-1-phenylethyl)isoxazolidine-3-carboxamido)-3-phenylpropanoate