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