You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[[4-(trifluoromethyl)-3,6-dihydro-2H-pyridin-1-yl]methyl]-2,3-dihydro-1H-indole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H17F3N2
assistant