title: [Synthetic enkephalins and multiple opiate receptors].
mesh_terms: D000818:Animals; D004745:Enkephalins / Q000032:analysis / Q000138:chemical synthesis*; D006168:Guinea Pigs; D051379:Mice; D010649:Phenylalanine / Q000032:analysis; D051381:Rats; D011957:Receptors, Opioid / Q000032:analysis*; D013329:Structure-Activity Relationship; D013552:Swine; D014443:Tyrosine / Q000032:analysis
chemical_list: D004745:Enkephalins; D011957:Receptors, Opioid; D014443:Tyrosine; D010649:Phenylalanine