InChI=1S/C11H15NO11/c13-4(2-1-3(12-21)9(17)18)22-11-7(16)5(14)6(15)8(23-11)10(19)20/h5-8,11,14-16,21H,1-2H2,(H,17,18)(H,19,20)/b12-3+