[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][#Branch2][C][S][=Branch1][C][=O][=Branch1][C][=O][O-1][NH2+1][C][Branch1][Ring1][C][O][Branch1][Ring1][C][O][C][O]"}, {"from": "gpt", "value": "The molecule is the zwitterionic form of TES buffer. It is a tautomer of a N-tris(hydroxymethyl)methyl-2-aminoethanesulfonic acid."}]