You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R)-1-(2,4-dichloro-5-fluorophenyl)ethyl]-2-(4-nitrophenyl)sulfanylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H13Cl2FN2O3S
assistant