title: The effect of dihydroergotamine on the phosphodiesterase activity of cat grey matter.
mesh_terms: D000818:Animals; D001921:Brain / Q000201:enzymology*; D002110:Caffeine / Q000494:pharmacology; D002415:Cats; D002845:Chromatography; D000242:Cyclic AMP / Q000032:analysis; D004878:Ergotamine / Q000494:pharmacology*; D010208:Papaverine / Q000494:pharmacology; D010744:Phosphoric Monoester Hydrolases / Q000032:analysis / Q000037:antagonists & inhibitors*; D013806:Theophylline / Q000494:pharmacology
chemical_list: D002110:Caffeine; D013806:Theophylline; D010208:Papaverine; D000242:Cyclic AMP; D010744:Phosphoric Monoester Hydrolases; D004878:Ergotamine