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 2-[(3-ethoxy-4-hydroxyphenyl)methyl]-1-ethyl-3-[1-(2-methylpropyl)piperidin-4-yl]guanidine using the IUPAC nomenclature.
user
C21H36N4O2
assistant