You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance S-(4-chlorophenyl) N-[5-[(4-chlorophenyl)sulfanylcarbonylamino]-2,6-dimethylpyridin-3-yl]carbamothioate .
user
C21H17Cl2N3O2S2
assistant