You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(5-bromo-3-methylpyridin-2-yl)butylamino]-5-[2-(6-methylpyridin-3-yl)ethyl]-1H-pyrimidin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26BrN5O
assistant