InChI=1S/C20H24O10/c1-27-12-9-11(8-7-10-5-3-2-4-6-10)28-19(26)16(12)29-20-15(23)13(21)14(22)17(30-20)18(24)25/h2-8,11-17,20-23H,9H2,1H3,(H,24,25)/b8-7+