You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (3aS,6aS)-1-methyl-5-(4-pentylphenyl)sulfonyl-2,3,3a,4,6,6a-hexahydropyrrolo[2,3-c]pyrrole into molecular formula.
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C18H28N2O2S
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