InChI=1S/C19H20N2O4/c1-20-7-5-13-9-17(21(23)24)18(22)10-15(13)16(11-20)14-4-2-3-12-6-8-25-19(12)14/h2-4,9-10,16,22H,5-8,11H2,1H3/t16-/m1/s1