InChI=1S/C21H18O12/c22-8-4-11(24)14-13(5-8)31-6-9(15(14)25)7-1-2-12(10(23)3-7)32-21-18(28)16(26)17(27)19(33-21)20(29)30/h1-6,16-19,21-24,26-28H,(H,29,30)