The molecule is a tetrapeptide comprising L-alanyl, gamma-D-glutamyl, meso-diaminopimelyl and L-alanine units in a linear sequence. It is a conjugate acid of a L-Ala-gamma-D-Glu-meso-Dap-D-Ala(1-).
(2S,6R)-2-amino-6-[[(4R)-4-[[(2S)-2-aminopropanoyl]amino]-4-carboxybutanoyl]amino]-7-[[(1R)-1-carboxyethyl]amino]-7-oxoheptanoic acid