You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [5-[3-fluoro-4-(trifluoromethyl)phenyl]-2-(2-methoxyphenyl)-7-methylimidazo[1,2-a]pyrimidin-6-yl]methanamine ?
user
C22H18F4N4O
assistant