Sesquiterpene Rich Oils from Leaves and Roots of Senecio rufinervis DC.

Abstract

The essential oils isolated by steam distillation from the leaves and roots of Senecio rufinervis DC., were analyzed by GC, GC/MS and ¹H- and ¹³C-NMR. A total of (92.5%) and (89.1%) of the constituents were identified in leaf and root oil, respectively. Both the oils were dominated by the sesquiterpenoids with germacrene D (33.7%), δ-cadinene (5.5%), γ-cadinene (5.5%), germacrene D-4-ol (5.4%), α-cadinol (4.9%) and β-longipinene (4.0%) as major constituents in leaf oil while germacrene D (32.9%), germacrene A (19.5%), δ-elemene (7.6%), α-cubebene (4.9%) and β-eudesmol (3.0%) were dominant in the root oil.

Key Word Index:

• Senecio rufinervis
• Asteraceae
• essential oil composition
• germacrene D
• germacrene A
• δ-cadinene
• β-caryophyllene
• germacrene D-4-ol