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