dilithium (2S)-2-[[(2S)-2-acetamido-3-phenylpropanoyl]amino]-6-oxoheptanedioate
dilithium (2S)-2-[[(2S)-2-acetamido-3-phenyl-propanoyl]amino]-6-oxo-heptanedioate
dilithium (2S)-2-[[(2S)-2-acetamido-1-oxo-3-phenylpropyl]amino]-6-oxoheptanedioate
dilithium (2S)-2-[[(2S)-2-acetamido-3-phenyl-propanoyl]amino]-6-keto-pimelate