preferred_name: (S)-nicotine + A + H2O => (S)-6-hydroxynicotine + AH2
preferred_name_lc: (s)-nicotine + a + h2o => (s)-6-hydroxynicotine + ah2
label: (S)-nicotine + A + H2O => (S)-6-hydroxynicotine + AH2
label_lc: (s)-nicotine + a + h2o => (s)-6-hydroxynicotine + ah2