You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-(3-fluorophenyl)-1H-pyrrolo[2,3-b]pyridin-2-yl]-5-piperidin-4-yl-1H-pyrazolo[4,3-b]pyridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H21FN6
assistant