title: Antagonism of morphine analgesia by adenine, adenosine, and adenine nucleotides.
mesh_terms: D000225:Adenine / Q000494:pharmacology*; D000241:Adenosine / Q000494:pharmacology*; D000244:Adenosine Diphosphate / Q000494:pharmacology; D000249:Adenosine Monophosphate / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000494:pharmacology; D000700:Analgesics / Q000037:antagonists & inhibitors*; D000818:Animals; D000242:Cyclic AMP / Q000494:pharmacology*; D003562:Cytidine / Q000494:pharmacology; D003839:Deoxyadenosines / Q000494:pharmacology; D007042:Hypoxanthines / Q000494:pharmacology; D008297:Male; D008722:Methods; D051379:Mice; D009020:Morphine / Q000037:antagonists & inhibitors*; D013329:Structure-Activity Relationship; D014529:Uridine / Q000494:pharmacology
chemical_list: D000700:Analgesics; D003839:Deoxyadenosines; D007042:Hypoxanthines; D000249:Adenosine Monophosphate; D003562:Cytidine; D000244:Adenosine Diphosphate; D009020:Morphine; D000255:Adenosine Triphosphate; D000242:Cyclic AMP; D000225:Adenine; D000241:Adenosine; D014529:Uridine