You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (2R)-N-[(1S)-1-(4-fluorophenyl)ethyl]-3-methyl-2-(2-oxopyrrolidin-1-yl)butanamide is given. What is its corresponding molecular formula?
user
C17H23FN2O2
assistant