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Synthesis and phosphodiesterase type-5 inhibitory activity of sildenafil analogues possessing a guanidine group in the phenyl ring[J]. Journal of China Pharmaceutical University, 2010, 41(2): 112-117.
Citation: Synthesis and phosphodiesterase type-5 inhibitory activity of sildenafil analogues possessing a guanidine group in the phenyl ring[J]. Journal of China Pharmaceutical University, 2010, 41(2): 112-117.
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Synthesis and phosphodiesterase type-5 inhibitory activity of sildenafil analogues possessing a guanidine group in the phenyl ring

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  • In this study，a series of new sildenafil analogues 11-27 possessing a guanidine group were synthesized to investigate their PDE5 inhibitory activity and selectivity using ［3H］ cGMP SPA kit in vitro and efficacy in the rat model of erection.Most of the compounds showed potent activity against PDE5，and more importantly，several compounds exhibited higher PDE5 selectivity over PDE6 than that of sildenafilStructure-activity relationship of these sildenafil analogues was also discussed.Within this series of compounds，compound 15 (IC50=1.7 nmol/L) not only exhibited more potent PDE5 inhibitory activity than that of sildenafil (IC50=6.5 nmol/L)，but also showed functional efficacy in the rat model of erection.
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