InChI=1S/C21H18O12/c22-8-3-1-7(2-4-8)10-6-31-17-9(12(10)24)5-11(23)18(16(17)28)32-21-15(27)13(25)14(26)19(33-21)20(29)30/h1-6,13-15,19,21-23,25-28H,(H,29,30)