InChI=1S/C21H15NO8/c1-9(12-8-15(25)10-4-2-6-13(23)16(10)19(12)27)18(26)17-11(5-3-7-14(17)24)20(28)22-21(29)30/h2-7,12,23-24H,1,8H2,(H,22,28)(H,29,30)