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 [(3S)-3-[3-(dimethylamino)propyl-methylamino]piperidin-1-yl]-(2,7-dimethylimidazo[1,2-a]pyridin-3-yl)methanone .
user
C21H33N5O
assistant