You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(5,6-dimethoxy-1,3-benzothiazol-2-yl)-2,1,3-benzothiadiazole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H12N4O3S2
assistant