Chemical Composition and Analyses of Enantiomers of Essential Oils from Madagascar

Abstract

The volatile constituents of twelve essential oils from Madagascar, namely those of Cinnamomum camphora (L.) Presl, Cinnamomum zeylanicum Blume (leaf oil), Hedychium¯avum Roxb., Helichrysum gymnocephalum Humbert, Helichrysum selaginifolium L., Lantana camara L., Pelargonium roseum Willd., Piper nigrum L., Ravensara aromatica Havozo (bark oil and leaf oil), Vetiveria zizanioides (L.) Nash ex Small and Zingiber ocinale Roscoe were identi®ed and quanti®ed by high resolution capillary gas chromatography coupled to mass spectrometry (HRGC±MS) and high resolution capillary gas chromatography (HRGC), respectively. In all the essential oils at least one of the ®ve chiral monoterpenes citronellol, limonene, linalol, terpinen-4-ol and a-terpineol was detected. Analysis of the enantiomers using multidimensional capillary gas chromatography (MDGC) revealed speci®c enantiomeric excesses, except for linalol, which was found in racemic form in P. roseum essential oil.

Chemical Composition, Antibacterial and Antioxidant Activities of Leaves Essential Oils from Syzygium cumini L., Cupressus sempervirens L. and Lantana camara L. from Egypt

“…10;2012 (3.22%), calarene (3.19%), ∆-cadinene (2.9%), α-pinene (2.11%) and trans-sabinene (1.09%). These results were in agreement with most published data like the South Chinese essential oil revealed by Sundufu and Shoushan (2004) where they found almost exact α-humulene (9.3%), higher 1,8-cineol (4.6%), lower sabinene (1.1%), lower α-pinene (0.8%), lower isomer β-caryophyllene (13.35%) and dominant higher germacrene D (15.9%) also higher germacrene D was found in other studies (da Silva et al, 1999;Möllenbeck et al, 1997). Recent study in Algeria reported that β-caryophyllene was dominant (35.7%) and lower α-humulene (3.72%), in L. camara oil (Zoubiri & Baaliouamer, 2011).…”

Effect of Leaf Positions on Total Phenolics, Flavonoids and Proanthocyanidins Content and Antioxidant Activities in Lantana Camara (L)

“…Triterpenes (Lantadene type), steroids and alkaloids are reported as major phytochemical constituents of L. camara [9][10][11][12][13]. However, published reports on leaf essential oil compositions have reported the high content of sesquiterpenes with mainly β-caryophyllene [13][14][15], zingiberene, arcurcumene [15], gemacrene-D, bisabolene [16], δ-humulene [13,17] derivatives up to 65% as major essential oil constituents. Although several reports are available in literature concerning phytochemical investigations and biological activities of L. camara, reports on accumulation of secondary metabolites such as phenolics, flavonoids and proanthocyanidins in leaves and their antioxidant activities has not yet been studied sufficiently.…”

Essential oils of camphor tree (cinnamomum camphora nees & eberm) cultivated in Southern Brazil

“…The oil with a high content of camphor has an important antifungal activity (Takaoka et al, 1976;Sattar et al, 1991). C. camphora has several chemical varieties which have different essential oil compositions (Hattori, 1981;Huergo et al, 1978;Lin et al, 1994;Akeng´a et al, 1994;Moellenbeck et al, 1997;Dung et al, 1993). Two varieties have been exploited commercially, Hon-Sho (C. camphora Nees & Eberm.…”