Setmelanotide Acetate is a melanocortin receptor 4 agonist which is an acetic acid salt of a synthetic peptide consisting of 8 amino acid residues. Chemical name is as follows: N2-Acetyl-L-arginyl-L-cysteinyl-D-alanyl-L-histidyl-D-phenylalanyl-L-arginyl-L-tryptophyl-L-cysteinamide, cyclic (2→8)-disulfide acetate