You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[2-methyl-6-(4-methylpiperazin-1-yl)pyrimidin-4-yl]piperazin-1-yl]-[2-(trifluoromethyl)phenyl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27F3N6O
assistant