[{"from": "human", "value": "Describe this molecule. [C][S][C][C][C][C][C][C][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is zwitterionic form of hexahomomethionine. It is a tautomer of a hexahomomethionine and a L-hexahomomethionine."}]