You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[2-(2,3-dimethylanilino)-2-oxoethyl]-2-fluoro-N-(oxolan-2-ylmethyl)pyridine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H24FN3O3
assistant