You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-azido-4-bromo-N-[4-[(4-methylpiperazin-1-yl)methyl]-3-(trifluoromethyl)phenyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H20BrF3N6O
assistant