InChI=1S/C22H21O12/c1-31-9-4-2-3-8(5-9)18-12(24)6-10-13(32-18)7-11(23)14(25)19(10)33-22-17(28)15(26)16(27)20(34-22)21(29)30/h2-7,15-17,20,22-28H,1H3,(H,29,30)