You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (4S,5R)-1-methyl-5-[5-(4-nitrophenyl)furan-2-yl]-4-pyridin-2-ylimidazolidine-2-thione into molecular formula.
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C19H16N4O3S
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