[{"from": "human", "value": "Describe this molecule. [C][Branch1][P][C][NH1+1][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][NH1+1][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a tetracarboxylic acid anion formed by deprotonation of two of the four carboxy groups in ethylenediaminetetraacetic acid (EDTA). It is a conjugate base of an ethylenediaminetetraacetic acid. It is a conjugate acid of an EDTA(3-)."}]