Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
Product name : Sildenafil Citrate
Other name: Sildenafil; Viagra
CAS register number: 171599-83-0
Molecular formula: C28H38N6O11S
Molecular weight : 666.7
Melting point: 187-189℃
Usage: Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, is a drug used to treat erectile dysfunction and pulmonary arterial hypertension (PAH). It was originally discovered by Pfizer scientists Andrew Bell, David Brown, and Nicholas Terrett. It acts by inhibiting cGMP-specific phosphodiesterase type 5 (PDE5), an enzyme that promotes degradation of cGMP, which regulates blood flow in the penis. Since becoming available in 1998, sildenafil has been the prime treatment for erectile dysfunction; its primary competitors on the market are tadalafil (Cialis) and vardenafil (Levitra) .
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