SMILES: C1=C(NC=[NH+]1)C[C@@H](C(=O)O)[NH3+]
Description: The molecule is the L-enantiomer of histidinium(2+). It has a role as an Escherichia coli metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate acid of a L-histidinium(1+). It is an enantiomer of a D-histidinium(2+).