2-((S)-1-((S)-2-((S)-1-(2-(2-((S)-1-(D-phenylalanyl)pyrrolidin-2-yl)thiazol-4-yl)oxazole-4-carbonyl)pyrrolidine-2-carboxamido)-6-(((benzyloxy)carbonyl)amino)hexanamido)ethyl)thiazole-4-carboxylic acid