SMILES: C1=CN(C2=NC(=NC2=C1)NCCC[C@@H](C(=O)O)N)CCCC[C@@H](C(=O)O)N
Description: 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.