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