You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,2-dimethyl-N-[2,2,2-trichloro-1-[[2-(1,3-dioxoisoindol-2-yl)phenyl]carbamothioylamino]ethyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21Cl3N4O3S
assistant