You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-amino-N-[2-[[2-[(5-bromopyridin-2-yl)amino]-2-oxoethyl]-methylamino]-2-oxoethyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H16BrN5O3
assistant