[4-((S)-3,6,9,12,15,18-Hexaoxo-20-phenoxymethyl-2,5,8,11,14,17-hexaaza-bicyclo[17.3.1]tricosa-1(23),19,21-trien-4-yl)-butyl]-carbamic acid benzyl ester

(2-{2-[2-(5-Amino-2-phenoxymethyl-benzoylamino)-acetylamino]-acetylamino}-acetylamino)-acetic acid ethyl ester

(2-{2-[2-(5-Nitro-2-phenoxymethyl-benzoylamino)-acetylamino]-acetylamino}-acetylamino)-acetic acid ethyl ester

{(S)-5-tert-Butoxycarbonylamino-5-[3-({[({[(hydrazinocarbonylmethyl-carbamoyl)-methyl]-carbamoyl}-methyl)-carbamoyl]-methyl}-carbamoyl)-4-phenoxymethyl-phenylcarbamoyl]-pentyl}-carbamic acid benzyl ester