SMILES: C1=C(NC=N1)C[C@@H](C(=O)N[C@@H](CC2=CN=CN2)C(=O)O)NC(=O)[C@H](CS)NC(=O)[C@H](CS)N
Description: The molecule is a tetrapeptide composed of two L-cysteine units joined to two L-histidine units by a peptide linkage. It has a role as a metabolite. It derives from a L-cysteine and a L-histidine.