SMILES: C1=C[N+](=CC(=C1O)O)C[C@@H](C(=O)O)N
Description: The molecule is a pyridinium ion that is L-alanine in which a methyl hydrogen is replaced by a 3,4-dioxidopyridinium-1-yl group. It is a conjugate acid of a 3-(3,4-dioxidopyridinium-1-yl)-L-alanine(1-) and a 3-(3,4-dihydroxypyridinium-1-yl)-L-alanine zwitterion.