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