InChI=1S/C21H18O12/c22-8-3-1-7(2-4-8)11-5-9(23)13-12(31-11)6-10(24)14(25)18(13)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