PDE9 Phosphodiesterase-4 inhibitor CC-1088 Phosphodiesterase inhibitor PDE10 PDE3 inhibitor PDE11 Filaminast Irsogladine Arofylline Piclamilast EHNA 8-Methoxymethyl-3-isobutyl-1-methylxanthine Siguazodan Quazinone HT-0712 Homosildenafil Zardaverine BRL-50481 Zaprinast Ibudilast Trapidil Moxaverine Papaverine Mardepodect Doxofylline Cilomilast SCH-51866 Enoximone Furafylline BAY 73-6691 YM-976 Trequinsin Rolipram Ensifentrine Sulfoaildenafil Milrinone Acetildenafil Udenafil Pentifylline Mirodenafil KMUP-1 Nitrosoprodenafil ICI-63197 Atizoram Aildenafil Amrinone Vinpocetine Bucladesine Avanafil MY-5445 Discovery and develop…

pment of phosphodiesterase 5 inhibitors Pimobendan Cilostamide Tadalafil Apremilast Tofisopam T-0156 Crisaborole Roflumilast Finasteride/tadalafil Lodenafil Vesnarinone PDE5 inhibitor Anagrelide Dipropylcyclopentylxanthine Enprofylline Pentoxifylline Icariin Vardenafil Dipyridamole Aminophylline Propentofylline Proxyphylline Mesembrenone Choline theophyllinate IBMX Theobromine Mesembrine Sildenafil Theophylline Etazolate Cartazolate 8-Cyclopentyl

-1,3-dimethylxanthine Tracazolate Diprophylline Paraxanthine Glaucine Caffeine