You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[1-(4-chlorophenyl)ethyl]-2-methyl-3-[2-(5-pyridin-2-yl-1,2,4-oxadiazol-3-yl)ethyl]guanidine;hydroiodide into its molecular formula.
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C19H22ClIN6O
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