You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[4-[1-(6-methylpyridin-3-yl)-4-pyridin-2-ylimidazol-2-yl]phenyl]pyrazolo[4,3-b]pyridine ?
user
C26H19N7
assistant