You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[6-[2-(trifluoromethyl)pyrimidin-5-yl]pyrimidin-4-yl]methyl]-1,3-dihydroisoindole into molecular formula.
user
C18H14F3N5
assistant