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