You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-ethyl-2-[(3-fluoro-4-imidazol-1-ylphenyl)methyl]-3-(3-pyrazol-1-ylpropyl)guanidine;hydroiodide into molecular formula.
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C19H25FIN7
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