You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl N-[2-[[[[1-(2,2-difluoroethyl)piperidin-4-yl]amino]-(ethylamino)methylidene]amino]ethyl]-N-propylcarbamate into its molecular formula.
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C20H39F2N5O2
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