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