The molecule is a pyridinium ion obtained by formal condensation of four molecules of lysine. It has a role as a biomarker. It is a pyridinium ion and a lysine derivative.
2-amino-6-[2-(4-amino-4-carboxybutyl)-3,5-bis(3-amino-3-carboxypropyl)pyridin-1-ium-1-yl]hexanoic acid