InChI=1S/C22H20O11/c1-30-19-13(32-22-18(27)16(25)17(26)20(33-22)21(28)29)6-5-12-15(19)11(24)8-14(31-12)9-3-2-4-10(23)7-9/h2-8,16-18,20,22-23,25-27H,1H3,(H,28,29)