Main > UROLOGY > Erectile Dysfunction > Treatment. > Sildenafil > Sildenafil Citrate > Co.: USA. P (Brand Tablet/Patents) > Structural Formula

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5-[2-ethoxy-5-(4-methyl piperazin-1-yl-sulphonyl)-phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyraz olo[4,3-d]pyrimidin-7-one


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