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See the DrugPatentWatch profile for tadalafil
Tadalafil is a synthetic, small-molecule drug used as a PDE-5 inhibitor for erectile dysfunction. The active ingredient itself is a single chemical compound, not a natural product. - Chemical formula (active ingredient): C22H19N3O4 - Approximate molecular weight: ~389 g/mol In a tablet, tadalafil is combined with inactive ingredients (excipients) such as fillers and binders, which vary by brand and formulation. If you want, I can provide the exact formula or the IUPAC name for the molecule.
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