InChI=1S/C21H20O12/c22-8-3-1-2-7(4-8)5-10-13(23)12-9(31-10)6-11(14(24)15(12)25)32-21-18(28)16(26)17(27)19(33-21)20(29)30/h1-4,6,10,16-19,21-22,24-28H,5H2,(H,29,30)