InChI=1S/C19H17FN2O6/c1-2-5-21-14-8-15(13(20)7-16(14)28-9-17(24)25)22-18(26)11-4-3-10(23)6-12(11)19(22)27/h1,7-8,10,21,23H,3-6,9H2,(H,24,25)