You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1-ethylimidazol-2-yl)-[1-[3-(5-fluoro-2-methoxyphenyl)phenyl]imidazol-4-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H19FN4O2
assistant