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A non-carcinogenic and detoxified glucuronidated form of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (nicotine-derived nitrosamine alcohol; NNAL), which is the primary metabolite of the potentially carcinogenic nitrosamine 4-methylnitrosamino-1,3-pyridyl-1-butanone (nicotine-derived nitrosamine ketone; NNK). NNAL-gluconuronide is detected in the urine of subjects exposed to tobacco products.
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