You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl N-[4-[2-(2-tert-butylpyridin-4-yl)-1,3-thiazol-4-yl]-3-chlorophenyl]-N-(trifluoromethylsulfanyl)carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H19ClF3N3O2S2
assistant