[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is zwitterionic form of pentahomomethionine. It is a tautomer of a pentahomomethionine."}, {"from": "gpt", "value": "[C][S][C][C][C][C][C][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]