You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[5-ethyl-3-(5-fluorofuran-2-yl)-5-methyl-4-oxofuran-2-yl]benzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H16FNO5S
assistant