InChI=1S/C21H18O10/c22-10-4-5-12-13(23)8-14(30-15(12)7-10)9-2-1-3-11(6-9)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)