You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[2-(dimethylamino)ethyl]-4-(dimethylsulfamoyl)-N-(6-methylsulfonyl-1,3-benzothiazol-2-yl)benzamide into its molecular formula.
user
C21H26N4O5S3
assistant