N'-(2-Amino-acetyl)-hydrazinecarboxylic acid 2,2,2-trichloro-1,1-dimethyl-ethyl ester

N'-{2-[(S)-4-Carbamoyl-2-(4-methoxy-benzyloxycarbonylamino)-butyrylamino]-acetyl}-hydrazinecarboxylic acid 2,2,2-trichloro-1,1-dimethyl-ethyl ester

(S)-4-((S)-3-Carbamoyl-1-{2-oxo-2-[N'-(2,2,2-trichloro-1,1-dimethyl-ethoxycarbonyl)-hydrazino]-ethylcarbamoyl}-propylcarbamoyl)-4-(4-methoxy-benzyloxycarbonylamino)-butyric acid benzyl ester