You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[4-[5-(ethoxymethyl)-2-methylpyrimidin-4-yl]piperidin-1-yl]-2-(4-fluorophenoxy)ethanone using the IUPAC nomenclature.
user
C21H26FN3O3
assistant