InChI=1S/C22H21O12/c1-31-10-3-8(2-9(23)4-10)19-14(25)7-12-13(24)5-11(6-15(12)33-19)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)