You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R)-1-(3-fluoro-4-methoxyphenyl)ethyl]-2-oxo-3,4-dihydro-1H-quinoline-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19FN2O3
assistant