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-butan-2-yl-2-[2-[4-(difluoromethoxy)phenyl]-2-hydroxyethyl]-3-[2-(furan-2-yl)ethyl]guanidine .
user
C20H27F2N3O3
assistant