This peptide has been obtained by by the usual method of solid phase resin starting from N-Boc-protected D-phenylalanine coupled to a methylbenzhydryl amine polystyrene resin (I) by successive cycles of Boc deprotection and coupling. The amino acid used were successively, N-Boc-D-tryptophan (II), N-Boc-D-arginine (IV), N-Boc-D-isoleucine (VI), N-Boc-D-phenylalanine (VIII) and N-Boc-D-histidine (X), yielding the intermediate peptide-resins (III), (V), (VII), (IX), and (XI). Finally, this last intermediate was deprotected and cleaved from the resin with HF, acetylated at the N-terminus and amidated at the C-terminus using standard methods.