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 8-[[(3R,8aR)-3-methyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-2-yl]sulfonyl]quinoline is given. What is its corresponding molecular formula?
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C17H21N3O2S
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