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-4-(1-ethylpyrazol-4-yl)-4-[3-(5-fluoropyridin-3-yl)phenyl]-1H-imidazol-5-one .
user
C19H17FN6O
assistant