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