Comparison of different heterocyclic scaffolds as substrate analog PDE5 inhibitors

Comparison of different heterocyclic scaffolds as substrate analog PDE5 inhibitors Optimization of Substituted N-3-Benzylimidazoquinazolinone Sulfonamides as Potent and Selective PDE5 Inhibitors Novel Pyrazolopyrimidopyridazinones with Potent and Selective Phosphodiesterase 5 (PDE5) Inhibitory Activity as Potential Agents for Treatment of Erectile Dysfunction Imidazo[5,1- f ] [1,2,4] triazin-4(3 H )-ones, a new class of potent PDE 5 inhibitors New pyrazolo[1′,5′:1,6]pyrimido[4,5-d]pyridazin-4(3H)-ones as potent and selective PDE5 inhibitors Exploration and optimization of substituted triazolothiadiazines and triazolopyridazines as PDE4 inhibitors Optimization of purine based PDE1/PDE5 inhibitors to a potent and selective PDE5 inhibitor for the treatment of male ED 2-Phenylquinazolin-4(3H)-one, a class of potent PDE5 inhibitors with high selectivity versus PDE6 N-3-Substituted Imidazoquinazolinones:  Potent and Selective PDE5 Inhibitors as Potential Agents for Treatment of Erectile Dysfunction Structure−Activity Relationships of N-Acyl Pyrroloquinolone PDE-5 Inhibitors