Volatile Constituents of the Essential Oil of Grindelia robusta Nutt. and Grindelia squarrosa Dun.

ABSTRACT

The essential oils of Grindelia robusta and Grindelia squarrosa were analyzed by GC. The oil of G. robusta was found to contain 141 constituents of which 12 were identified. Bornyl acetate (12.28%) and α-pinene (12.15%) were the major compounds of the monoterpene fraction. The oil of G. squarrosa contained about 100 constituents and showed a very similar composition. α-Pinene (25.53%) was found to be a major compound

KEY WORD INDEX:

• Grindelia robusta
• Grindelia squarrosa
• Asteraceae
• essential oil composition
• monoterpenes
• borneol
• bornyl acetate
• α-pinene