InChI=1/C19H19N3O4/c1-3-15(20-11-14-5-4-10-26-14)16-17(23)21-19(25)22(18(16)24)13-8-6-12(2)7-9-13/h4-10,20H,3,11H2,1-2H3,(H,21,23,25)/b16-15-/f/h21H DAD56F0551F1B4E0