The molecule is a peptide anion that is the conjugate base of L-Ala-gamma-D-Glu-meso-Dap-D-Ala, arising from deprotonation of the the three carboxy groups and protonation of both amino groups; major species at pH 7.3. It is a conjugate base of a L-Ala-gamma-D-Glu-meso-Dap-D-Ala.
(2S,6R)-2-azaniumyl-6-[[(4R)-4-[[(2S)-2-azaniumylpropanoyl]amino]-4-carboxylatobutanoyl]amino]-7-[[(1R)-1-carboxylatoethyl]amino]-7-oxoheptanoate