英文别名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-(2-hydroxyethyl)-,(6R,12aR)-rel-; Tadalafil Impurity 107; rel-(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-(2-hydroxyethyl)pyrazino[1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione; Tadalafil Impurity 177; 2-Hydroxyethyl Nortildenafil 
