You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3-chloro-2-fluorophenyl)-2-[5-(diethylsulfamoyl)-2-oxopyridin-1-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C17H19ClFN3O4S
assistant