cis-Tadalafil;(6R,12aS)-;Tadalafil IMpurity: IMpurity H;Tadalafil EP IMpurity A (cis-tadalafil);6R,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-,(6R, 12aS)-;(6R,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 A
