You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule tert-butyl 6-(6-fluoro-1H-indol-3-yl)-4-methylsulfonyl-2,3,3a,5-tetrahydropyrrolo[3,2-b]pyrrole-1-carboxylate .
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C20H24FN3O4S
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