You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-amino-N-[(3S,4R)-1-[(3S)-1-azabicyclo[2.2.2]octan-3-yl]-3-methoxypiperidin-4-yl]-5-chloro-2-methoxybenzamide .
user
C21H31ClN4O3
assistant