%0 Journal Article %T Volatile Chemical Constituents of Piper aduncum L and Piper gibbilimbum C. DC (Piperaceae) from Papua New Guinea %A Topul Rali %A Stewart W Wossa %A David N Leach %A Peter G Waterman %J Molecules %D 2007 %I MDPI AG %R 10.3390/12030389 %X Exhaustive hydro-distillation of the leaves of Piper aduncum and fruits of Piper gibbilimbum (Piperaceae) afforded colorless and pale orange colored oils in 0.35 and 0.30 % yields, respectively. Detailed chemical analysis by GC/MS indicated the volatile constituents of Piper aduncum to be composed of dill apiole (43.3 %), ¦Â-caryophyllene (8.2 %), piperitione (6.7 %) and ¦Á-humulene (5.1 %), whilst the oil of P. gibbilimbum is dominated by the gibbilimbols A-D (74.2 %), with the remaining major constituents being the terpenes camphene (13.6 %) and ¦Á-pinene (6.5 %). %K Piper aduncum %K Piper gibbilimbum %K Piperaceae %K dill apiole %K gibbilimbol A-D %U http://www.mdpi.com/1420-3049/12/3/389