[{"from": "human", "value": "Describe this molecule. [C][C][NH1+1][Branch1][=Branch2][C@@H1][Ring1][Ring2][C][=Branch1][C][=O][O-1][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is the tricarboxylic acid monoanion that is the conjugate base of (S,S,S)-nicotianamine, resulting from deprotonation of the central carboxy group and zwitterion formation of the other two. One of two major microspecies at physiological pH. It is a conjugate base of a (S,S,S)-nicotianamine."}]