You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-N-[2-[2-(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctanoylamino)ethylamino]ethyl]octanamide by IUPAC nomenclature, provide its molecular formula.
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C20H11F30N3O2
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