You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-ethoxy-N-[2-oxo-2-(2,3,4-trifluoroanilino)ethyl]-N-propylnaphthalene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H23F3N2O3
assistant