6-Hydroxynicotine

(S)-6-Hydroxy Nicotine

5-[(2S)-1-Methyl-2-pyrrolidinyl]-

5-[(2S)-1-Methyl-2α-pyrrolidinyl]pyridine-2-ol

5-[(2S)-1-Methylpyrrolidin-2-yl]pyridin-2(1H)-one