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