| Synonyms: | ent-Tadalafil;Tadalafil Impurity B (ent-tadalafil);Tadalafil EP Impurity B ((6S,12S)-Tadalafil);Pyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione, 6-(1,3- benzodioxol-5-yl)-2,3,6,7,12, 12a-hexahydro-2-Methyl-,(6S, 12aS)-;(6S,12aS)-6-(1,3-benzodioxol-5-yl)-2-Methyl-2,3,6,7,12,12a-hexahydropyrazino[1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione;Tadanafil EP or USP impurity B;(S,S)-Tadalafil;(6S,12aS)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-Methyl-pyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione |