InChI=1S/C22H20O10/c1-8-18(26)20(28)21(29)22(31-8)17-12(25)7-15-16(19(17)27)11(24)6-13(32-15)9-3-4-10(23)14(5-9)30-2/h3-8,20-23,25,27-29H,1-2H3/t8-,20+,21+,22?/m0/s1