You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(5-bromo-3-methyl-2-oxopyridin-1-yl)-N-[2-chloro-5-(trifluoromethyl)phenyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H13BrClF3N2O2
assistant