InChI=1S/C20H22O10/c1-27-13-8-12(28-14(21)9-13)7-4-10-2-5-11(6-3-10)29-20-17(24)15(22)16(23)18(30-20)19(25)26/h2-7,9,12,15-18,20,22-24H,8H2,1H3,(H,25,26)/b7-4+