InChI=1S/C21H18O10/c22-10-5-3-4-9(8-10)17-18(13(23)11-6-1-2-7-12(11)29-17)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)