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 1-ethyl-2-[[2-(4-ethylpiperazin-1-yl)pyridin-4-yl]methyl]-3-(1-propanoylpyrrolidin-3-yl)guanidine .
user
C22H37N7O
assistant