SMILES: C1=CC=C(C=C1)C[C@@H](C(=O)N[C@@H](CC2=CNC3=CC=CC=C32)C(=O)N[C@@H](CC4=CC=C(C=C4)O)C(=O)O)NC(=O)[C@H](CCC(=O)N)N
Description: The molecule is a tetrapeptide composed of L-glutamine, L-phenylalanine, L-tryptophan and L-tyrosine joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-glutamine, a L-phenylalanine, a L-tryptophan and a L-tyrosine.