You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-methyl-2-[3-methyl-5-(1H-pyrazolo[3,4-b]pyridin-4-yl)phenyl]propanenitrile is given. What is its corresponding molecular formula?
user
C17H16N4
assistant