You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(2-bromo-5-fluorophenyl)methyl]-1-ethyl-3-[2-(2-hydroxyethyl)pentyl]guanidine;hydroiodide into its molecular formula.
user
C17H28BrFIN3O
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