InChI=1S/C22H20O10/c1-9-13(10-5-3-2-4-6-10)14(23)11-7-8-12(15(24)19(11)30-9)31-22-18(27)16(25)17(26)20(32-22)21(28)29/h2-8,16-18,20,22,24-27H,1H3,(H,28,29)