InChI=1S/C19H17FN2O5/c1-2-7-21-14-9-15(13(20)8-16(14)27-10-17(23)24)22-18(25)11-5-3-4-6-12(11)19(22)26/h1,8-9,21H,3-7,10H2,(H,23,24)