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 2-[[2-(dimethylamino)pyridin-3-yl]methyl]-1-ethyl-3-[2-(3-fluorophenyl)-2-methylpropyl]guanidine .
user
C21H30FN5
assistant