InChI=1S/C21H18O10/c22-11-7-6-10-13(23)12(8-9-4-2-1-3-5-9)29-17(10)18(11)30-21-16(26)14(24)15(25)19(31-21)20(27)28/h1-8,14-16,19,21-22,24-26H,(H,27,28)