InChI=1/C16H16N4O4/c1-10-6-7-12(9-14(10)20(23)24)19-16(22)15(21)18-11(2)13-5-3-4-8-17-13/h3-9,11H,1-2H3,(H,18,21)(H,19,22)/t11-/m1/s1/f/h18-19H 31D613176305542D