title: A superactive antinociceptive pentapeptide, (D-Met2, Pro5)-enkephalinamide.
mesh_terms: D000577:Amides / Q000138:chemical synthesis*; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D001681:Biological Assay; D008715:Methionine; D009294:Narcotics; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000494:pharmacology; D011392:Proline; D051381:Rats
chemical_list: D000577:Amides; D009294:Narcotics; D009842:Oligopeptides; D011392:Proline; D008715:Methionine