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