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 4-acetyl-N'-ethyl-N-[2-(2-fluorophenyl)cyclopropyl]piperazine-1-carboximidamide;hydroiodide is given. What is its corresponding molecular formula?
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C18H26FIN4O
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