InChI=1S/C21H18O12/c22-8-5-11-14(15(25)13(31-11)4-7-1-2-9(23)10(24)3-7)12(6-8)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)