“…This included all the compounds with the Ac-His-Arg-(pI)DPhe-Xxx-NH 2 motif (1, 2, 3), all of the compounds possessing an Ac-Arg-Gln-(pI)DPhe-Xxx-NH 2 motif (25,26,27), two of the compounds possessing the Ac-His-Arg-(pCl)DPhe-Xxx-NH 2 motif (6, 7), and two of the compounds possessing the Ac-Val-Arg-(pCl)DPhe-Xxx-NH 2 motif (38,39). Five members of this group possessed the sequence Ac-Xxx-Gln-(pI)DPhe-Xxx-NH 2 (26,27,25,11,41). An additional member of this group possessed the structure Ac-Val-Arg-(pI)DPhe-Tic-NH 2 (33), and another possessed the structure Ac-Arg-Gln-(pCl)DPhe-DTic-NH 2 (30).…”