You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[[4-fluoro-3-(hydroxymethyl)phenyl]methyl]-1-(5,6,7,8-tetrahydronaphthalen-1-yl)guanidine;hydroiodide into its molecular formula.
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C19H23FIN3O
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