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 tert-butyl N-cyclopropyl-N-[2-[[N-ethyl-N'-[2-hydroxy-2-(5-methylfuran-2-yl)propyl]carbamimidoyl]amino]ethyl]carbamate .
user
C21H36N4O4
assistant