InChI=1/C20H20N2O4/c1-13-10-16(23)15(12-22-6-8-25-9-7-22)20-18(13)19(24)17(26-20)11-14-2-4-21-5-3-14/h2-5,10-11,23H,6-9,12H2,1H3/b17-11-	DC4FA131ECF2CA2E