You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3-fluoro-2-methoxyphenyl)-[2-(quinoxalin-2-ylmethyl)-7-azabicyclo[2.2.1]heptan-7-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H22FN3O2
assistant