You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-methyl-3-(methylsulfamoyl)phenyl]-2-[(2S)-3-oxo-4H-1,4-benzoxazin-2-yl]acetamide into its molecular formula.
user
C18H19N3O5S
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