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 3-(7-cyclopropyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)-N-[(3S)-1-methylsulfonylpiperidin-3-yl]pyridin-2-amine is given. What is its corresponding molecular formula?
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C20H24N6O2S
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