You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[5-[3-(4-pyridin-4-yl-1H-benzimidazol-2-yl)-2H-pyrazolo[3,4-b]pyridin-5-yl]pyridin-2-yl]amino]propan-1-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22N8O
assistant