You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-[(3R)-3-(6-ethyl-5-fluoropyrimidin-4-yl)oxypyrrolidin-1-yl]-2-oxoethyl]-3-(2-methoxyphenyl)imidazolidin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26FN5O4
assistant