Viagra Molecule 3D Jsmol
Viagra -- Sildenafil Citrate
Sildenafil citrate, sold under the names Viagra, Revatio and under various other names, is a drug used to treat male erectile dysfunction (impotence) and pulmonary arterial hypertension (PAH), developed by the pharmaceutical company Pfizer. Its primary competitors on the market are tadalafil (Cialis), and vardenafil (Levitra). For complete text click here...
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Sildenafil (Viagra) Molecular Structure 
Chemical Formula: C22H30N6O4S