You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 6-[(4R,5R)-5-(4-fluorophenyl)-5-(2-fluoropyridin-4-yl)-4-methyl-1,4-dihydroimidazol-2-yl]-1H-pyridin-2-one ?
user
C20H16F2N4O
assistant