InChI=1S/C21H16O10/c22-8-3-12(23)11-6-15(26)20(31-16(11)4-8)10-5-14(25)19(28)17-9(10)1-7(21(29)30)2-13(24)18(17)27/h1-5,15,20,22-23,25-26,28H,6H2,(H,24,27)(H,29,30)