You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-(4-chlorophenyl)-1-[(1S,5R)-3-(pyridin-3-ylmethyl)-3,6-diazabicyclo[3.2.2]nonan-6-yl]ethanone ?
user
C21H24ClN3O
assistant