You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-cyano-3-(trifluoromethyl)phenyl]-2-[3-(4-fluorophenyl)-5-methylpyrazol-1-yl]acetamide into its molecular formula.
user
C20H14F4N4O
assistant