You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(3-chloroquinolin-4-yl)methyl]-5-methyl-3-[4-(trifluoromethylsulfanyl)phenyl]imidazolidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H15ClF3N3O2S
assistant