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Nicotiana rustica  L. (Aztec tobacco) is the only  Nicotiana species,  except common tobacco ( N. tabacum  L.), which is cultivated for tabacco products. The leaves of  N. rustica , however, accumulate various specialized metabolites of potential interest. Therefore, the objective of this study was to evaluate certain classes of metabolites (by HPLC and GC-MS) in the leaves, the essential oil (EO), concrete and resinoid of  N. rustica .    Three pentacyclic triterpenes were identified in the leaves (by HPLC): betulin (252.78 µg g -1 ), betulinic (182.53 µg   g   -1   ) and oleanolic  (69.44 µg   g   -1   ) acids. The dominant free phenolic acids in the leaves (by HPLC) were rosmarinic (4257.38 µg g -1 ) and   chlorogenic   (1714.40 µg g -1 ), and conjugated forms of vanillic (3445.71 µg g -1 ), sinapic (1963.11 µg g -1 ), and syringic (1784.96 µg g -1 ). The major flavonoids in the leaves were luteolin (960.44 µg g -1 ), apigenin (880.66 µg g -1 ) and   hyperosid (780.72 µg g -1 ). The GS-MS profiling of the EO identified 19 components and the major ones were  phytol (43.68   %)  ,   solanone   (5.54   %  )  ,   cis-5-  b  utyl-4-methyldihydrofuran-2(3H)-one (5  .  23   %  )  , dihydro-β-ionone   (4.25   %  )  ,   α-ionene   (3  .  54   %  )  ,  and β-damascenone   (  3.  03   %  )  . The major volatiles in the concrete were   isoamyl alcohol (28  .  82   %),   oxynicotine   (  9  .  02   %),   phytol   (  7.80   %),   4-mеthyl-1-penthanol   (  6  .  33   %),   cotinine   (  5.55   %) and   3-metyl-3-penthanol   (  4.09   %). Resinoid composition was dominant by  nicotine   (  39  .  75   %  ),   phytol   (  11  .  23   %),   eicosane   (  4  .  88   %),   diethyl phthalate   (  4  .  19   %),   dibutyl phthalate   (  3  .  48   %) and   solanone   (  3  .  27   %)  . Concrete and resinoid showed weak antibacterial activity   . These results create grounds for considering  N. rustica  as a source to obtain aroma or other bioproducts.

Chemical constituents in leaves and aroma products of Nicotiana rustica L. tobacco