InChI=1/C21H16N2O7/c1-29-12-8-9-22-17(11-12)19(24)23-16-4-2-3-5-18(16)30-13-6-7-14(20(25)26)15(10-13)21(27)28/h2-11H,1H3,(H,23,24)(H,25,26)(H,27,28)/p-2/fC21H14N2O7/h23H/q-2 11BC95D25B862E06