title: A new purine ring closure and the synthesis of 2-substituted derivatives of adenosine cyclic 3',5'-phosphate.
mesh_terms: D000818:Animals; D001921:Brain / Q000201:enzymology; D002417:Cattle; D000242:Cyclic AMP / Q000138:chemical synthesis*; D003500:Cyclization; D003864:Depression, Chemical; D004789:Enzyme Activation / Q000187:drug effects; D008168:Lung / Q000201:enzymology; D010084:Oxidation-Reduction; D010727:Phosphoric Diester Hydrolases / Q000378:metabolism; D011494:Protein Kinases / Q000378:metabolism; D011687:Purines; D013329:Structure-Activity Relationship
chemical_list: D011687:Purines; D000242:Cyclic AMP; D011494:Protein Kinases; D010727:Phosphoric Diester Hydrolases