You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3R)-1-[3-fluoro-5-[(4-fluoro-7-methyl-2,3-dihydro-1H-indol-2-yl)methylamino]phenyl]pyrrolidin-3-yl]pyrrolidin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H28F2N4O
assistant