You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3,5-difluoro-4-[[3-[5-(trifluoromethyl)-1H-imidazol-2-yl]piperidin-1-yl]methyl]pyridine into its molecular formula.
user
C15H15F5N4
assistant