You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(1-ethylpyrrolidin-2-yl)methyl]-1-[2-[2-(4-fluorophenyl)-1,3-oxazol-4-yl]ethyl]guanidine;hydroiodide into its molecular formula.
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C19H27FIN5O
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