[{"from": "human", "value": "What can you tell me about this molecule? [C][Branch1][P][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a tetracarboxylic acid anion formed by deprotonation of three of the four carboxy groups in ethylenediaminetetraacetic acid (EDTA). It is a conjugate base of an EDTA(2-). It is a conjugate acid of an EDTA(4-)."}]