InChI=1S/C22H20O10/c1-29-19-13(31-22-18(26)16(24)17(25)20(32-22)21(27)28)8-7-12-15(19)11(23)9-14(30-12)10-5-3-2-4-6-10/h2-9,16-18,20,22,24-26H,1H3,(H,27,28)