[{"from": "human", "value": "Please give me some details about this molecule. [C][N][C@@H1][Branch1][=N][C][C][=C][Branch1][#Branch1][N][=C][N][Ring1][Branch1][C][S][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a L-histidine derivative that is N-methyl-L-histidine substituted at positions N3 and C5 on the imidazole ring by methyl and mercapto groups respectively. It has a role as a marine metabolite, a radical scavenger and an antioxidant. It is an aryl thiol and a L-histidine derivative. It is a tautomer of an ovothiol B zwitterion."}]