You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(3S)-5-(4-fluorophenyl)-3-(3-nitrophenyl)-3,4-dihydropyrazol-2-yl]-2-oxoethyl]-N,2-dimethylpropanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23FN4O4
assistant