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