PDE9 Phosphodiesterase-4 inhibitor Phosphodiesterase inhibitor CC-1088 PDE10 PDE3 inhibitor PDE11 Filaminast Arofylline Piclamilast EHNA 8-Methoxymethyl-3-isobutyl-1-methylxanthine Siguazodan Quazinone Irsogladine HT-0712 Zardaverine Homosildenafil Zaprinast Ibudilast BRL-50481 Moxaverine Trapidil Doxofylline Cilomilast Mardepodect SCH-51866 Enoximone BAY 73-6691 Furafylline Papaverine Trequinsin Milrinone Rolipram Sulfoaildenafil Ensifentrine Pentifylline Udenafil Acetildenafil Atizoram Amrinone Aildenafil Nitrosoprodenafil ICI-63197 KMUP-1 Mirodenafil Vinpocetine Bucladesine Avanafil YM-976 Discovery and development of phosp…

phodiesterase 5 inhibitors MY-5445 Cilostamide Pimobendan Tadalafil Apremilast Tofisopam T-0156 Roflumilast Crisaborole PDE4B Finasteride/tadalafil Vesnarinone Lodenafil PDE5 inhibitor Anagrelide Dipropylcyclopentylxanthine Enprofylline Pentoxifylline Icariin Vardenafil Propentofylline Aminophylline Dipyridamole Proxyphylline Mesembrenone Choline theophyllinate Theobromine Mesembrine IBMX Sildenafil Cartazolate Etazolate Theophylline 8-Cyclopentyl-1,3-dimethylxanthine Tracazolate

Diprophylline Paraxanthine Glaucine Caffeine