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