You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(6-chloro-1,3-benzothiazol-2-yl)-2-(3,4-dimethylphenyl)-N-(pyridin-2-ylmethyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H20ClN3OS
assistant