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