[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an S-substituted glutathione that is glutathione in which the mercapto hydrogen has been replaced by a methyl group. It is a S-substituted glutathione and a methyl sulfide. It is a tautomer of a S-methylglutathione zwitterion."}, {"from": "gpt", "value": "[C][S][C][C@@H1][Branch1][N][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]