InChI=1S/C11H16N2O11/c14-3(15)1-2(9(19)20)12-11(23)13-8-6(18)4(16)5(17)7(24-8)10(21)22/h2,4-8,16-18H,1H2,(H,14,15)(H,19,20)(H,21,22)(H2,12,13,23)