Description: Peptide to Opioid receptor antagonist Form: Lyophilized powder CAS Number : 152274-66-3Molecular Formula : C44H66N12O7S2Molecular Weight : 939.2Purity : > 95%Chemical Structure : Ac-Arg-Phe-Met-Trp-Met-Lys-NH2Storage/Stability : Shipped at 4°C. Store at -20°C for one year.