[{"from": "human", "value": "Provide a description of this molecule. [C][C@@H1][Branch2][Branch1][Ring1][C][=Branch1][C][=O][N][C@H1][Branch2][Ring2][Branch1][C][C][C][=Branch1][C][=O][N][C@H1][Branch1][=N][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][N][C@H1][Branch1][C][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "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-)."}]