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