You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1-tert-butyl-6-cyclopropyl-3-methylpyrazolo[3,4-b]pyridin-4-yl)-(4-methylpiperidin-1-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H30N4O
assistant