PDE9 Phosphodiesterase-4 inhibitor CC-1088 Phosphodiesterase inhibitor PDE10 PDE3 inhibitor PDE11 Filaminast Arofylline Piclamilast EHNA Irsogladine 8-Methoxymethyl-3-isobutyl-1-methylxanthine Siguazodan Zardaverine Homosildenafil Quazinone HT-0712 Zaprinast Ibudilast BRL-50481 Moxaverine Trapidil Doxofylline Cilomilast Mardepodect Papaverine SCH-51866 Enoximone BAY 73-6691 Furafylline Trequinsin Udenafil Milrinone Pentifylline Rolipram Sulfoaildenafil Ensifentrine Acetildenafil Atizoram Amrinone Aildenafil Nitrosoprodenafil ICI-63197 YM-976 KMUP-1 Mirodenafil Vinpocetine Bucladesine Discovery and development of phosphodiesterase 5 inhibitors Avanafil MY-5…

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