InChI=1/C20H20N2O4/c1-3-25-20(24)17-12-22-18-15-7-5-4-6-14(15)8-9-16(18)19(17)21-10-11-26-13(2)23/h4-9,12H,3,10-11H2,1-2H3,(H,21,22)/f/h21H 87C8F1D903D547E2