InChI=1S/C22H20O12/c1-31-20-17-11(9(23)7-10(32-17)8-5-3-2-4-6-8)12(24)14(26)18(20)33-22-16(28)13(25)15(27)19(34-22)21(29)30/h2-7,13,15-16,19,22,24-28H,1H3,(H,29,30)