You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[6-methyl-5-[(3-methylphenyl)methyl]-2-propan-2-ylpyrimidin-4-yl]piperazin-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H30N4O
assistant