You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4,7-dibromo-5,6-dinitro-2,1,3-benzothiadiazole;5,6-dinitro-4,7-dithiophen-2-yl-2,1,3-benzothiadiazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H6Br2N8O8S4
assistant