You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-chloro-N-[2-(dimethylamino)ethyl]-N-(4-methylsulfanyl-1,3-benzothiazol-2-yl)benzamide;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H21Cl2N3OS2
assistant