摘要:
1H-Pyrazolo[4,3-d] pyrimidines are a class of potent and selective second generation phosphodiesterase 5 (PDE5) inhibitors. This work explores the potency, selectivity and efficacy of 1-(2-ethoxyethyl)-1H-pyrazolo[4,5-d] pyrimidines as PDE5 inhibitors resulting in the advancement of a clinical candidate. (C) 2010 Elsevier Ltd. All rights reserved.