The chemical Udenafil has a known molecular formula of C25-H36-N6-O4-S. Synonyms may include: DA-8159, 5-(2-Propyloxy-5-(1-methyl-2-pyrollidinylethylamidosulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo(4,3-d)pyrimidine-7-one, UNII-L5IB4XLY36, DA 8159, 3-(1-methyl-7-oxo-3-propyl-4,7-dihydro-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-N-{2-((2RS)- 1-methylpyrrolidin-2-yl)ethyl}-4-propoxybenzenesulfonamide, Zydena (ChemID).