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