You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
cyclopropyl-[1'-(5-fluoropyridine-3-carbonyl)spiro[6,7-dihydro-1H-imidazo[4,5-c]pyridine-4,4'-piperidine]-5-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H22FN5O2
assistant