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