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 1-[4-[8-fluoro-5-(4-fluorophenyl)-3,4,4a,9b-tetrahydro-1H-pyrido[4,3-b]indol-2-yl]butyl]indole-2,3-dione into molecular formula.
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C29H27F2N3O2
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