You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(4-fluorophenyl)methyl]-4-oxo-4-(3-oxo-4H-1,4-benzoxazin-6-yl)butanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H17FN2O4
assistant