You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2-fluorophenyl)methyl]-2-[(4S)-4-methyl-2,5-dioxo-4-thiophen-3-ylimidazolidin-1-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H16FN3O3S
assistant