You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-(5-chloro-1,3-benzoxazol-2-yl)-1-bicyclo[2.2.2]octanyl]-1,1-dioxothiane-4-carboxamide into its molecular formula.
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C21H25ClN2O4S
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