You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3R)-N-(4-fluorophenyl)-3-[(3-oxo-4H-1,4-benzothiazin-6-yl)sulfonyl]butanamide .
user
C18H17FN2O4S2
assistant