You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (4-amino-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-2-yl)-(2-methylsulfonylphenyl)methanone;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C15H21ClN2O3S
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