title: Analgesic activity of enkephalin analogues containing aminophosphonic acid residues at C-terminal position.
mesh_terms: D000818:Animals; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology*; D063065:Organophosphonates / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D004723:Endorphins; D004745:Enkephalins; D063065:Organophosphonates