N-(1-(3-(2-Ethoxyphenyl)-5-oxo-2,5-dihydro-1,2,4-triazin-6-yl)ethyl)butyramide

This compound is an amide derivative used as a pharmaceutical intermediate in the manufacturing of impurities related to vardenafil. It features a triazinone ring with an ethoxyphenyl substituent and a butanamide side chain.