You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[6-[6-[6-[(1S)-1-aminopropyl]pyridin-2-yl]-4-fluoroindazol-1-yl]pyridin-2-yl]methanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H20FN5O
assistant