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-cyanophenyl)-3-[[(2R,4S,5S)-5-(diethylaminomethyl)-1-azabicyclo[2.2.2]octan-2-yl]methyl]urea .
user
C21H31N5O
assistant