You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(6-bromo-3,4-dihydro-2H-quinolin-1-yl)-2-[2-(3,4-dimethoxyphenyl)-1,3-thiazol-4-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21BrN2O3S
assistant