InChI=1S/C11H18N2O9/c1-3(9(17)18)2-12-11(21)13-8-6(16)4(14)5(15)7(22-8)10(19)20/h3-8,14-16H,2H2,1H3,(H,17,18)(H,19,20)(H2,12,13,21)