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