Essential oils of the rhizomes ofAlpinia conchigera Griff. andAlpinia latilabris Ridl.

Abstract

The essential oils obtained by hydrodistillation of the rhizomes of Alpinia conchigera and Alpinia latilabris were analysed by capillary GC and GC-MS; 50 compounds were identified in A. conchigera rhizome oil, among which 30 have not been detected previously. The major chemical class was terpenoids, with β β β β β-bisabolene (28.9%), 1,8-cineole (15.3%) and β β β β β-caryophyllene (10.0%) the major components. A. latilabris rhizomes yielded 33 identified constituents, the majority terpenoids, but the oil was clearly dominated by methyl (E)-cinnamate (89.5%).

Essential Oil Composition and Antimicrobial Activities of Two Closely Related Species,Alpinia muticaRoxb. andAlpinia latilabrisRidl., from Peninsular Malaysia

“…Analysis of the unripe and ripe fruit oils of A. latilabris resulted in the identification of 45 and 44 constituents, respectively. In contrast to its rhizome oil being rich in phenylpropanoids, in particular trans -methyl cinnamate (89.5%) [ 15 ], monoterpenoids (91.7% and 92.1%) characterized the oils of the unripe and ripe fruits, respectively, with 1,8-cineole (34.2% and 35.9%), β -pinene (20.2% and 19.0%), α -pinene (8.2% and 8.8%), camphor (7.4% and 8.8%), and camphene (5.1% and 5.8%) accounting for more than half of each sample, respectively.…”

Essential Oils of Alpinia Rafflesiana and Their Antimicrobial Activities

“…Several Alpinia species have been investigated for their essential oil compositions [4]. The essential oil composition of Malaysian Alpinia species have been reported by Sirat et al [5][6][7][8], Ibrahim et al [9] and Wong et al [10]. In continuation of our investigation of the essential oils of Alpinia species, we investigated the chemical composition of A. rafflesiana and their antimicrobial activity.…”

“…The leaf oil afforded 45 (97.34%) identified constituents and the most abundant components were trans-caryophyllene (32.61%), caryophyllene oxide (8.67%) and (2E, 6Z)-farnesol (4.91%). The occurance of trans-caryophyllene as the major constituent in Alpinia essential oils has been reported in A. officinarum Hance [11], A. conchigera Griff [10], A. speciosa [12], the rhizome and seed oils of A. galanga [13], the fruit oil of A. purpurata [14] and the leaf and rhizome oils of A. smithae [15]. Trans-caryophyllene, is known for its anti-inflammatory and local anesthetic activities.…”

An overview of the chemical composition and biological activities of essential oils fromAlpiniagenus (Zingiberaceae)

“…Previous studies showed that A. conchigera extracts contained various bioactive compounds such as b-sitosterol, 1 0 -acetoxychavicol acetate, 1 0 -acetoxyeugenol acetate, 114 chavicol, chavicol acetate, 1-hydroxychavicol acetate, 4-acetoxycinnamyl alcohol and 4acetoxycinnamyl acetate. 114 There have been several studies investigating the chemical composition of the essential oils isolated from A. conchigera. For example, the rhizome oil of A. conchigera from Penang, Malaysia had b-bisabolene, 1,8-cineole and b-caryophyllene as its main compounds, 114 while the rhizome oil collected from Pagoh, Malaysia was characterized by the predominance of b-sesquiphellandrene, b-bisabolene and 1,8-cineole.…”