You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(3-chlorophenyl)-1-[4-[(6-methylpyrimidin-4-yl)amino]piperidin-1-yl]propan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H23ClN4O
assistant