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-pentan-3-yl-3-[4-[4-(piperidin-1-ylmethyl)pyridin-2-yl]oxybut-2-enyl]urea using the IUPAC nomenclature.
user
C21H34N4O2
assistant