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