is conjugate base of is enantiomer of 3-(1-methylpyrrolidin-2-yl)pyridine (S)-nicotine (R)-nicotine A 3-(1-methylpyrrolidin-2-yl)pyridine in which the chiral centre has <i>R</i>-configuration. d-nicotine (+)-nicotine chebi_ontology CHEBI:39162 (R)-3-(1-methyl-2-pyrrolidinyl)pyridine pseudonicotine (R)-nicotinium(1+)