InChI=1S/C21H18O12/c22-10-4-8-14(5-11(10)23)31-6-9(15(8)25)7-1-2-13(12(24)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)