(R)-3-{[2-((S)-1-tert-Butoxycarbonylamino-ethyl)-thiazole-4-carbonyl]-amino}-pentanoic acid (S)-1-({(S)-1-[((S)-1-tert-butoxycarbonyl-2-phenyl-ethyl)-methyl-carbamoyl]-2-methyl-propyl}-methyl-carbamoyl)-ethyl ester

2-[(S)-1-((S)-2-tert-Butoxycarbonylamino-3-hydroxy-propionylamino)-ethyl]-thiazole-4-carboxylic acid ethyl ester

2-{[2-((S)-1-tert-Butoxycarbonylamino-ethyl)-thiazole-4-carbonyl]-amino}-acrylic acid

2-(2-{[2-((S)-1-tert-Butoxycarbonylamino-ethyl)-thiazole-4-carbonyl]-amino}-acryloylamino)-acrylic acid

A name could not be generated for this structure.