You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-(1-acetylpiperidin-4-yl)-3-[5-(3-chlorophenyl)pyrazin-2-yl]-1-methylurea;molecular iodine by IUPAC nomenclature, provide its molecular formula.
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C19H22ClI20N5O2
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