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-(3,4-dihydro-2H-chromen-4-yl)-3-ethyl-2-[2-[5-(trifluoromethyl)pyridin-2-yl]oxyethyl]guanidine .
user
C20H23F3N4O2
assistant