InChI=1S/C11H16O11/c1-11(10(19)20,2-3(12)13)22-9-6(16)4(14)5(15)7(21-9)8(17)18/h4-7,9,14-16H,2H2,1H3,(H,12,13)(H,17,18)(H,19,20)