You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[6-[[(1R,4R,5R,6S)-6-fluoro-2-methyl-2-azabicyclo[2.2.1]heptan-5-yl]-methylamino]pyridazin-3-yl]-5-imidazol-1-ylphenol .
user
C21H23FN6O
assistant