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 N-[N-(3-chloro-4-fluorophenyl)-N'-(oxolan-2-ylmethyl)carbamimidoyl]-3,5-dimethoxybenzamide .
user
C21H23ClFN3O4
assistant