[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the L-enantiomer of histidinium(1+). It has a role as an Escherichia coli metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate base of a L-histidinium(2+). It is a conjugate acid of a L-histidine. It is an enantiomer of a D-histidinium(1+)."}, {"from": "gpt", "value": "[C][=C][Branch1][=Branch1][N][C][=NH1+1][Ring1][Branch1][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]