You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 2-[[4-[(2,4-difluorophenyl)-phenylmethoxy]piperidin-1-yl]methyl]pyridine-4-carboxylate into its molecular formula.
user
C27H28F2N2O3
assistant