You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(2-chlorophenyl)-2-methyl-5-[(4S)-4-methyl-5-oxo-2-sulfanylideneimidazolidin-1-yl]benzenesulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C17H16ClN3O3S2
assistant