[{"from": "human", "value": "Describe this molecule. [C][N][Branch1][C][C][C][Branch2][Ring1][=Branch1][C][C][C][=N][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a L-histidine derivative that is L-histidine substituted at poisition 2 (on the imidazole ring) by a 3-carboxy-3-(dimethylamino)propyl group. It is a non-proteinogenic L-alpha-amino acid and a L-histidine derivative. It is a tautomer of a 2-[3-carboxylato-3-(dimethylammonio)propyl]-L-histidine dizwitterion."}]