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 [(3R,4R)-3-(hydroxymethyl)-4-(piperidin-1-ylmethyl)pyrrolidin-1-yl]-[5-(methylsulfanylmethyl)furan-2-yl]methanone is given. What is its corresponding molecular formula?
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C18H28N2O3S
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