You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named ethyl (3S)-1-[N'-[(4-cyano-2-fluorophenyl)methyl]-N-ethylcarbamimidoyl]piperidine-3-carboxylate;hydroiodide is given. What is its corresponding molecular formula?
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C19H26FIN4O2
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