SMILES: C[C@H]([C@@H](C(=O)N[C@@H](CC1=CNC2=CC=CC=C21)C(=O)N[C@@H](CC3=CC=C(C=C3)O)C(=O)O)NC(=O)[C@H](CCCCN)N)O
Description: The molecule is a tetrapeptide composed of L-lysine, L-threonine, L-tryptophan and L-tyrosine joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-lysine, a L-tryptophan, a L-threonine and a L-tyrosine.