You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(3,5-difluoroanilino)-N-[(3S)-3-methyl-1,1-dioxothiolan-3-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C13H16F2N2O3S
assistant