Chemical Constituents of the Bark Oil of Goniothalamus macrophyllus Hook. f. from Malaysia

Abstract

The bark oils of Goniothalamus macrophyllus Hook. f., obtained from two different sites, were investigated by capillary GC and GC/MS. The oils were found to possess little differences in the chemical composition but considerable variation in the levels of the individual components. The oils were rich in monoterpenoids (91.8–94.0%), with terpinen-4-ol at 38.8% and 42.7%, respectively, as the dominant component. The major differences between the oils were the presence of appreciable amounts of 1,8-cineole (18.1%), geranyl acetate (11.1%) and geraniol (9.7%) in one sample and relatively low amounts of these compounds in the other sample. However, the latter sample contained signifi cantly higher concentrations of (Z)-β-ocimene (25.4%) and α-terpineol (10.0%).

Key Word Index:

• Goniothalamus macrophyllus
• Annonaceae
• essential oil composition
• terpinen-4-ol
• 1,8-cineole
• geranyl acetate
• (Z)-β-ocimene
• α-terpineol