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.
(2S)-2-amino-3-(3,4-dihydroxypyridin-1-ium-1-yl)propanoic acid