InChI=1S/C21H20O12/c22-9-3-7-8-5-30-18-6(17(8)31-12(7)4-10(9)23)1-2-11(13(18)24)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)