You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-(1-methylpyridin-1-ium-3-yl)-4-[7-(1-methylpyridin-1-ium-3-yl)-2,1,3-benzothiadiazol-4-yl]-2,1,3-benzothiadiazole by IUPAC nomenclature, provide its molecular formula.
user
C24H18N6S2+2
assistant