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