You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-chloro-N-[4-(3,4-dimethoxyphenyl)-1,3-thiazol-2-yl]-3-(methanesulfonamido)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H18ClN3O5S2
assistant