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