You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-(1,2,3,3a,4,6,7,7a-octahydropyrrolo[3,2-c]pyridin-5-ylsulfonyl)-1,3-dimethylpyrimidine-2,4-dione;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C13H21ClN4O4S
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