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Under IUPAC nomenclature, a molecule named 1-ethyl-2-[[1-[[(2R)-oxolan-2-yl]methyl]tetrazol-5-yl]sulfanylmethyl]-5-piperidin-1-ylsulfonylbenzimidazole is given. What is its corresponding molecular formula?
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C21H29N7O3S2
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