7,8-Dihydro-8-ethyl-2-(3-noradamantyl)-4-propyl-1H-imidazo[2,1-i]purin-5(4H)-one: a potent and water-soluble adenosine A1 antagonist

7,8-Dihydro-8-ethyl-2-(3-noradamantyl)-4-propyl-1H-imidazo[2,1-i]purin-5(4H)-one: a potent and water-soluble adenosine A1 antagonist Imidazo[2,1-i]purin-5-ones and Related Tricyclic Water-Soluble Purine Derivatives:  Potent A_2A- and A₃-Adenosine Receptor Antagonists 1H-Imidazo[4,5-c]quinolin-4-amines: novel non-xanthine adenosine antagonists 8-Polycycloalkyl-1,3-dipropylxanthines as potent and selective antagonists for A1-adenosine receptors 8-(Dicyclopropylmethyl)-1,3-dipropylxanthine: a potent and selective adenosine A1 antagonist with renal protective and diuretic activities 2-n-Butyl-9-methyl-8-[1,2,3]triazol-2-yl-9H-purin-6-ylamine and Analogues as A_2A Adenosine Receptor Antagonists. Design, Synthesis, and Pharmacological Characterization Selective Inhibitors of Cyclic AMP-Specific Phosphodiesterase:  Heterocycle-Condensed Purines Synthesis and in Vitro Characterization of N-[5-(4,5-Dihydro-1H-imidazol-2-yl)- 2-hydroxy-5,6,7,8-tetrahydronaphthalen-1-yl]methanesulfonamide and Its Enantiomers:  A Novel Selective α_1A Receptor Agonist 8-Substituted 1,3-dimethyltetrahydropyrazino[2,1-f]purinediones: Water-soluble adenosine receptor antagonists and monoamine oxidase B inhibitors Imidazodiazepinediones: a new class of adenosine receptor antagonists