[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an L-polyhomomethionine zwitterion obtained by transfer of a proton from the carboxy to the amino group of L-tetrahomomethionine; major species at pH 7.3. It is a L-polyhomomethionine zwitterion and a tetrahomomethionine zwitterion. It is a tautomer of a L-tetrahomomethionine."}, {"from": "gpt", "value": "[C][S][C][C][C][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]