(S)-methyl2-(5-(((R)-2-amino-3-mercaptopropyl)amino)-[1,1'-biphenyl]-2-ylcarboxamido)-4-(methylthio)butanoate2,2,2-trifluoroacetate;N-[4-[2(R)-Amino-3-mercaptopropyl]amino-2-phenylbenzoyl]methionine Methyl Ester Trifluoroacetate Salt; Methyl (2S)-2-[[(5-[[(2R)-2-amino-3-sulfanylpropyl]amino][1,1'-biphenyl]-2-yl)carbonyl]amino]-4-(methylsulfanyl)butanoate Trifluoroacetate