You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-[3-bromo-5-cyano-4-(methoxymethyl)-2-methyl-6-oxopyridin-1-yl]-N-[(4,5-dimethoxy-2-nitrophenyl)methylideneamino]acetamide ?
user
C20H20BrN5O7
assistant