You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-ethyl-4-fluoro-11-oxo-5-propan-2-yl-3-(1-propan-2-ylpiperidin-4-yl)-6H-indolo[2,3-b]quinoline-8-carbonitrile into molecular formula.
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C29H33FN4O
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