InChI=1S/C12H16O11/c13-5(14)1-3-4(21-3)2-6(15)22-12-9(18)7(16)8(17)10(23-12)11(19)20/h3-4,7-10,12,16-18H,1-2H2,(H,13,14)(H,19,20)