You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [4-[3-(1,3-benzothiazol-2-ylsulfanyl)propylsulfonyl]piperazin-1-yl]-(furan-2-yl)methanone is given. What is its corresponding molecular formula?
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C19H21N3O4S3
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