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 1-propan-2-yl-N-[1-(pyridin-2-ylmethyl)piperidin-4-yl]pyrazolo[3,4-b]pyridine-5-carboxamide .
user
C21H26N6O
assistant