InChI=1S/C21H18O12/c22-8-3-1-7(2-4-8)10-5-9(23)13-11(31-10)6-12(14(24)15(13)25)32-21-18(28)16(26)17(27)19(33-21)20(29)30/h1-6,16-19,21-22,24-28H,(H,29,30)/t16-,17-,18+,19-,21+/m0/s1