phenylmethyl N-[(2S)-1-(cyanomethylamino)-1-oxo-3-phenylpropan-2-yl]carbamate
phenylmethyl N-[(1S)-2-(cyanomethylamino)-2-oxo-1-(phenylmethyl)ethyl]carbamate
N-[(1S)-2-(cyanomethylamino)-2-oxo-1-(phenylmethyl)ethyl]carbamic acid phenylmethyl ester
N-[(1S)-1-(benzyl)-2-(cyanomethylamino)-2-keto-ethyl]carbamic acid benzyl ester
phenylmethyl N-[(2S)-1-(cyanomethylamino)-1-oxo-3-phenyl-propan-2-yl]carbamate