InChI=1S/C22H20O12/c23-10-1-8-11(3-13(10)33-22-18(26)16(24)17(25)20(34-22)21(27)28)29-5-9-7-2-14-15(31-6-30-14)4-12(7)32-19(8)9/h1-4,9,16-20,22-26H,5-6H2,(H,27,28)