You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (Z)-2-(4-bromo-2-chlorophenyl)-3-(4-methoxy-6-methyl-1,3-benzothiazol-2-yl)prop-2-enenitrile into molecular formula.
user
C18H12BrClN2OS
assistant