You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-methyl-4-[6-[1-(4-pyridin-3-ylphenyl)ethylamino]pyrimidin-4-yl]piperazin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H24N6O
assistant