[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][N][C][=N][C][=C][Ring1][Branch1][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a L-histidine derivative that is L-histidine substituted by a methyl group at position 3 on the imidazole ring; major species at pH 7.3. It is a L-histidine derivative, a non-proteinogenic L-alpha-amino acid and a zwitterion. It is a tautomer of a N(pros)-methyl-L-histidine."}]