1-(2-(2,2,2-trifluoroethoxy)ethyl-1H-pyrazolo[4,3-d]pyrimidines as potent phosphodiesterase 5 (PDE5) inhibitors
Tollefson, Michael B ; Acker, Brad A ; Jacobsen, E J ; Hughes, Robert O ; Walker, John K ; Fox, David N A ; Palmer, Michael J ; Freeman, Sandra K ; Yu, Ying ; Bond, Brian R
Bioorganic & medicinal chemistry letters, 2010-05, Vol.20 (10), p.3125-3128 [Periódico revisado por pares]England
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