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