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