You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3R)-3-amino-N-[4-(4-chloro-1,3-benzothiazol-2-yl)-1,1-dioxothian-4-yl]-4-(2-fluorophenyl)butanamide by IUPAC nomenclature, provide its molecular formula.
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C22H23ClFN3O3S2
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