You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[(2S)-3-ethyl-2-pyrrolidin-1-ylpentyl]-3-[4-(3-oxopiperazin-1-yl)phenyl]urea using the IUPAC nomenclature.
user
C22H35N5O2
assistant