Table 3.

Volatile components of DCM and n-hexane extracts in three species of Scrophularia

Extracts	Total identified content (%)	Compound (content %)
DCM
S. atropatana	95.33	n-alkanes (84.92%), diterpene (1.3%), fatty acids and their derivatives (8.17%), heterocyclic hydrocarbons (0.94%)
S. frigida	95.95	diterpene (69.02%), fatty acid (26.91%)
S. subaphylla	74.65	diterpene (59.87%), linear alcohol (9.33%), fatty acid (5.45%)
n-hexane
S. atropatana	95.04%	oxygenated monoterpens (14.76%), fatty acid (2.42%), alkanes (77.86%)
S. frigida	96.13%	Fatty acids and their derivatives (46.96%), alkanes (39.73%), linear ketone (1.22%), steroids (8.22%)
S. subaphylla	80.09%	fatty acid (1.83 %), alkanes (78.26%)