InChI=1S/C22H21O12/c1-31-15-4-8(19-12(25)7-10-11(24)5-9(23)6-14(10)32-19)2-3-13(15)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)