InChI=1S/C15H19N5O8/c1-2-5(21)4-3-16-11-6(17-4)12(25)19-15(18-11)20-13-9(24)7(22)8(23)10(28-13)14(26)27/h7-10,13,22-24H,2-3H2,1H3,(H,26,27)(H3,16,18,19,20,25)