You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[1-[(3,4-difluorophenyl)methyl]piperidin-4-yl]-N-(2-methoxyethyl)piperidine-3-carboxamide .
user
C21H31F2N3O2
assistant