You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1-benzylpyrrolidin-2-yl)methyl]-2-(1,4-diazabicyclo[2.2.2]octan-2-ylmethyl)-3-ethylguanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H36N6
assistant