title: Enkephalin analogs containing amino sulfonic acid and amino phosphonic acid residues at position 5.
mesh_terms: D000818:Animals; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology*; D009020:Morphine / Q000494:pharmacology; D063065:Organophosphonates / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship; D013451:Sulfonic Acids / Q000494:pharmacology
chemical_list: D004723:Endorphins; D004745:Enkephalins; D063065:Organophosphonates; D013451:Sulfonic Acids; D009020:Morphine