InChI=1S/C19H17F3N2O4/c1-12(13-7-5-8-15(10-13)19(20,21)22)23-28-11-14-6-3-4-9-16(14)17(18(25)26)24-27-2/h3-10H,11H2,1-2H3,(H,25,26)/b23-12+,24-17+