InChI=1S/C12H16O10/c1-4(13)5(2-6(14)15)3-21-12-9(18)7(16)8(17)10(22-12)11(19)20/h2,7-10,12,16-18H,3H2,1H3,(H,14,15)(H,19,20)/b5-2-