You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-bromo-N-[1-(dimethylamino)ethyl]-N-([1,3]dioxolo[4,5-g]quinolin-8-yl)-5-nitrobenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H19BrN4O5
assistant