You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(5-bromo-2-fluorophenyl)methylideneamino]-2-[4-(4-methylphenyl)sulfonylpiperazin-1-yl]acetamide into its molecular formula.
user
C20H22BrFN4O3S
assistant