6-Chloronicotine (also known as 2-chloro-5-((2S)-1-methylpyrrolidin-2-yl)pyridine, 960-232-1, 6-Chloro-nicotine, 2-chloro-5-(1-methylpyrrolidin-2-yl)pyridine, 2-Chloro-5-(1-methyl-2-pyrrolidinyl)-pyridine; 6-Chloro-nicotine, Nicotine, 6-chloro-, Pyridine, 2-chloro-5-[(2S)-1-methyl-2-pyrrolidinyl]-, F13104, En300-6478527 or 2-Chloro-5-((S)-1-methyl-pyrrolidin-2-yl)-pyridine) is a substance of the pyrrolidine class.