NNK
Nicotine-derived nitrosamine ketone (NNK), or 4-(methylnitrosamino)- 1-(3-pyridyl)-1-butanone, is a nitrosamine present in tobacco that is a potent procarcinogen. It is activated by CYP2A6. It is a biomarker of exposure to cigarette smoke. It is produced upon the curing of tobacco.
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