You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[5-(cyclobutylmethylamino)-2-fluorophenyl]-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H20F3N3O
assistant