Fused pyrimidine based inhibitors of phosphodiesterase 7 (PDE7): synthesis and initial structure–activity relationships

Fused pyrimidine based inhibitors of phosphodiesterase 7 (PDE7): synthesis and initial structure–activity relationships Identification of purine inhibitors of phosphodiesterase 7 (PDE7) Novel Heterocyclic-Fused Pyridazinones as Potent and Selective Phosphodiesterase IV Inhibitors Design and synthesis of pyrazolo[3,4-d]pyrimidinone derivatives: Discovery of selective phosphodiesterase-5 inhibitors Synthesis and phosphodiesterase 5 inhibitory activity of novel pyrido[1,2-e]purin-4(3H)-one derivatives Synthesis and Biological Activity of Pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidines as Phosphodiesterase Type 4 Inhibitors Syntheses and evaluation of pyrido[2,3-d]pyrimidine-2,4-diones as PDE 4 inhibitors 7-Methoxyfuro[2,3-c]pyridine-4-carboxamides as PDE4 Inhibitors: A Potential Treatment for Asthma Rhodanine derivatives as novel inhibitors of PDE4 8-(3-Chloro-4-methoxybenzyl)-8H-pyrido[2,3-d]pyrimidin-7-one derivatives as potent and selective phosphodiesterase 5 inhibitors