The molecule is an imidazopyridine having norleucine and ornithine residues attached via their side-chains at the 4- and 2-positions respectively. It has a role as a cross-linking reagent and a biomarker. It is an imidazopyridine and a non-proteinogenic L-alpha-amino acid.
(2S)-2-amino-6-[2-[[(4S)-4-amino-4-carboxybutyl]amino]imidazo[4,5-b]pyridin-4-yl]hexanoic acid