You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-chloro-N-[2,2,2-trichloro-1-[(4-nitrophenyl)carbamothioylamino]ethyl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H12Cl4N4O3S
assistant