N-3-Substituted Imidazoquinazolinones:  Potent and Selective PDE5 Inhibitors as Potential Agents for Treatment of Erectile Dysfunction

N-3-Substituted Imidazoquinazolinones:  Potent and Selective PDE5 Inhibitors as Potential Agents for Treatment of Erectile Dysfunction Quinazolines as potent and highly selective PDE5 inhibitors as potential therapeutics for male erectile dysfunction Substituted Pyrazolopyridines as Potent and Selective PDE5 Inhibitors:  Potential Agents for Treatment of Erectile Dysfunction Optimization of Substituted N-3-Benzylimidazoquinazolinone Sulfonamides as Potent and Selective PDE5 Inhibitors Substituted Pyrazolopyridopyridazines as Orally Bioavailable Potent and Selective PDE5 Inhibitors:  Potential Agents for Treatment of Erectile Dysfunction Pyrimidinylpyrroloquinolones as Highly Potent and Selective PDE5 Inhibitors for Treatment of Erectile Dysfunction Quinolines as extremely potent and selective PDE5 inhibitors as potential agents for treatment of erectile dysfunction Optimization of purine based PDE1/PDE5 inhibitors to a potent and selective PDE5 inhibitor for the treatment of male ED Imidazo[5,1- f ] [1,2,4] triazin-4(3 H )-ones, a new class of potent PDE 5 inhibitors Furoyl and Benzofuroyl Pyrroloquinolones as Potent and Selective PDE5 Inhibitors for Treatment of Erectile Dysfunction