(S)-6-hydroxynicotine + AH2 => (S)-nicotine + A + H2O
(s)-6-hydroxynicotine + ah2 => (s)-nicotine + a + h2o
(S)-6-hydroxynicotine + AH2 => (S)-nicotine + A + H2O
(s)-6-hydroxynicotine + ah2 => (s)-nicotine + a + h2o