You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,2,2-trifluoro-N-[(3S)-3-[(4-nitrophenyl)methyl]-2-oxopyrrolidin-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H12F3N3O4
assistant