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 6-methyl-1-(8-methyl-8-azabicyclo[3.2.1]octan-3-yl)-2-phenylpyrazolo[3,4-b]pyridin-3-one .
user
C21H24N4O
assistant