Sildenafil citrate drug molecule
Sildenafil citrate. Molecular model of the drug sildenafil citrate (C22.H30.N6.O4.S), used to treat erectile dysfunction and pulmonary arterial hypertension. Its trade names include Viagra and Revatio. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue), oxygen (red) and sulphur (yellow). Illustration.
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