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-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)-2-[2-(4-fluorophenoxy)ethyl]guanidine using the IUPAC nomenclature.
user
C18H20FN3O3
assistant