You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[4-(3-chloro-4-methoxyphenyl)-1,3-thiazol-2-yl]-3-(3,4,5-trimethoxyphenyl)prop-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21ClN2O5S
assistant