InChI=1/C20H16N2O6/c1-25-20(24)12-2-5-14(6-3-12)21-19(23)15-11-17(28-22-15)13-4-7-16-18(10-13)27-9-8-26-16/h2-7,10-11H,8-9H2,1H3,(H,21,23)/f/h21H CA258F1EB5EFD987