You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[5-ethyl-6-methyl-2-[3-(trifluoromethyl)phenyl]pyrimidin-4-yl]piperazin-1-yl]-(3-methoxyphenyl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27F3N4O2
assistant