You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(1S)-1-(4-bromo-2-fluorophenyl)ethyl]-2-(5-chlorothiophen-2-yl)-2-oxoacetamide by IUPAC nomenclature, provide its molecular formula.
user
C14H10BrClFNO2S
assistant