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'-methyl-N-[2-(3-methylpiperidin-1-yl)ethyl]-4-(1-oxo-1-pyrrolidin-1-ylpropan-2-yl)piperazine-1-carboximidamide .
user
C21H40N6O
assistant