InChI=1/C20H20N2O4/c1-3-12-9-14(16(24)10-15(12)23)19-18(11(2)21-22-19)13-5-4-6-17-20(13)26-8-7-25-17/h4-6,9-10,23-24H,3,7-8H2,1-2H3,(H,21,22)/f/h21H D32C3B18FCC5DCC1