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Convert the IUPAC name of a molecule (6Z)-6-[[3-chloro-4-[(2-methyl-5-oxo-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-yl)methoxy]phenyl]methylidene]-5-imino-2-methyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one into molecular formula.
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C20H14ClN7O3S2
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