InChI=1S/C15H18N4O4/c16-10(6-13(17)20)14(21)19-12(15(22)23)5-8-7-18-11-4-2-1-3-9(8)11/h1-4,7,10,12,18H,5-6,16H2,(H2,17,20)(H,19,21)(H,22,23)