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system
Provide the molecular formula for the IUPAC named substance 6-[[1-(3-chloro-4-methylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one .
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C19H16ClN5OS
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