InChI=1S/C21H18O12/c22-8-4-2-1-3-7(8)11-5-9(23)13-10(24)6-12(14(25)18(13)31-11)32-21-17(28)15(26)16(27)19(33-21)20(29)30/h1-6,15-17,19,21-22,24-28H,(H,29,30)/t15-,16-,17+,19-,21+/m0/s1