Viagra [ sildenafil | 5-[2-ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl]-1-methyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7-one | 5-[2-ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1-{[3-(6 ]
Viagra [ sildénafil | 5-[2-éthoxy-5-(4-méthylpipérazin-1-ylsulfonyl)phényl]-1-méthyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7-one | 5-[2-éthoxy-5-(4-méthylpipérazin-1-ylsulfonyl)phényl]-1-méthyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one | citrate ]