[(R)-2-(2-Acetylamino-acetylamino)-3-(4-methyl-benzylsulfanyl)-propionylamino]-acetic acid
(S)-4-Amino-4-[(S)-3-carbamoyl-1-((S)-1-carboxy-2-methylcarbamoyl-ethylcarbamoyl)-propylcarbamoyl]-butyric acid benzyl ester
Boc-Gln-ONp
Cys(4-CH3Bzl)-Gly-OCH3
Gln-Asn-NH-CH3