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 2-[1-[N'-[2-(4-chlorophenyl)-2-methylpropyl]-N-ethylcarbamimidoyl]piperidin-3-yl]acetamide .
user
C20H31ClN4O
assistant