(R,S)-Anatabine is a a minor tobacco alkaloid found in the Solanaceae family of plants that can be used as a specific marker for the detection of tobacco use[1].
[1]. Lai FY, et al. Levels of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in raw wastewater as an innovative perspective for investigating population-wide exposure to third-hand smoke. Sci Rep. 2018 Sep 5;8(1):13254.