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