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