InChI=1S/C19H20N2O4/c1-24-16-8-4-5-9-17(16)25-11-10-20-19(23)14-12-18(22)21-15-7-3-2-6-13(14)15/h2-9,14H,10-12H2,1H3,(H,20,23)(H,21,22)