You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-amino-5-[2-(fluoromethyl)pyridin-4-yl]-5-(4-fluoro-3-pyridin-2-ylphenyl)-3-methylimidazol-4-one .
user
C21H17F2N5O
assistant