英文别名(6R,14aR)-6-(1,3-benzodioxol-5-yl)-2-methyl-6,8,14,14a-tetrahydro-3H-pyrazino[1,2-d][1,4]benzodiazonine-1,4,7,13-tetrone; Tadalafil Ketolactam; rel-(6R,14aR)-6-(1,3-Benzodioxol-5-yl)-2,3,14,14a-tetrahydro-2-methylpyrazino[1,2-d][1,4]benzodiazonine-1,4,7,13(6H,8H)-tetrone; rel-(6R,14aR)-6-(Benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,14,14a-tetrahydrobenzo[h]pyrazino[1,2-d][1,4]diazonine-1,4,7,13(6H,8H)-tetraone; Tadalafil Impurity H [EP]; TADALAFIL IMPURITY H [EP IMPURITY]; Tadalafil Imp. H (EP) 
