InChI=1S/C13H16N4O6/c14-9(12(20)21)5-6-10(18)17-16-8-3-1-7(2-4-8)11(19)15-13(22)23/h1-4,9,16H,5-6,14H2,(H,15,19)(H,17,18)(H,20,21)(H,22,23)