[{"from": "human", "value": "What can you tell me about this molecule? [C][N][C][=C][Branch1][Branch1][N][=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 zwitterion in which the methyl group is at N(tele)-position; major microspecies at pH 7.3. It is a tautomer of a N(tele)-methyl-L-histidine."}]