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-butan-2-yl-2-[4-[2-(4-methylpiperidin-1-yl)-2-oxoethyl]piperazin-1-yl]acetamide .
user
C18H34N4O2
assistant