Chemical composition and antioxidant activity of essential oil of leaves and flowers of Alternanthera sessilis red from Sabah

Abstract

In the present study, chemical composition and antioxidant activity of essential oil from the aerial parts of Alternanthera sessilis red has been investigated. The chemical composition of essential oil of A. sessilis red was determined by GC-MS analysis. Determination of antioxidant nature of A. sessilis red was carried out by 1,1diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method using butylated hydroxytoulene (BHT)as the positive control. The major components of essential oil of leaves, as analyzed by the GC-MS were found to be 1,1,1,5,5,5-hexamethyl-3,3-bis[trimethylsilyl)oxy]trisiloxane (15.43%), S,S-dioxide trans-2-methyl-4-Npentylthiane (11.27%), didodecylphthalate (10.62%) and tetrahydro-2,5-dimethoxy furan (10.01%).However, the major components of essential oil of flower were 1,1,1,5,5,5-hexamethyl-3,3bis[trimethylsilyl)oxy]trisiloxane (17.76%), trans-4-ethyl-5-octyl-2,2-bis(trifluromethyl)-1,3-dioxolane (11.12%) and tetrahydro-2,5-dimethoxy furan ( 9.10%).

GC-MS Analysis of Chemical Constituents and in vitro Antioxidant Activity of the Organic Extracts from the Stem of Bridelia stipularis

“…The compounds were identified by comparison of their retention indices (RI) with those provided in National Institute of Standards and Technology (NIST) library. Identification was assumed when a good match of RI was achieved (Khan et al 2016).…”

The Chemical Constituents' of the Leave Essential Oil of Alternanthera Pungens (Kunth)

“…-cadinene (3.06%), 1, 2dimethyl cyclooctene (3.05%), para-cymene (2.96%), phytol (2.67%) and neophytadiene (2.50%) with the lowest percentage (Table 1.0). essential oil from the leaves of Alternanthera pungens grown in Nigeria differ quantitatively and qualitatively from previously reported member of the genus (Khan et al, 2016). This may be attributable to factors such as the ecological and climatic conditions as well nature and age of the plant, period of collection, handling procedures and other related factors known to induce variation in essential oil composition extracted from plants (Gurusaravanan et al, 2010;Verma et al, 2013;Inikpi et al, 2014;Rehman et al, 2016;Ibanez and Blazquez, 2019).…”

“…The other characteristics compounds previously reported from A. sessilis were; octyl ester-2-propenoic acid (9.32%), 1-fluorododecane (6.60%), 1-chlorooctadecane (3.99%), methyl-2-O-methyl-á-D-xylofuranoside (3.13%), (Z)-7t e t r a d e c e n e ( 3 . 1 2 % ) , t r i m e t h y l ( 4terbutylphenoxy) silane (2.98%), 1,1'-oxybisheptane (2.41%), cis-4-penty l-5-propyl-2, 2-bis (trifluoromethyl)-1, 3-dioxane (2.29%) and 9heptadecanone (2.06%) (Khan et al, 2016). (Khan et al, 2016) as compared to aceto monocyclic monoterpenoids (42.18%) which is the major class in the present study.…”

“…1 2 % ) , t r i m e t h y l ( 4terbutylphenoxy) silane (2.98%), 1,1'-oxybisheptane (2.41%), cis-4-penty l-5-propyl-2, 2-bis (trifluoromethyl)-1, 3-dioxane (2.29%) and 9heptadecanone (2.06%) (Khan et al, 2016). (Khan et al, 2016) as compared to aceto monocyclic monoterpenoids (42.18%) which is the major class in the present study. It was observed that constituents and the compositional pattern of mass spectra with those from NIST (Data base 69) and Wiley 9th Version and the home-made MS library composed of pure substances and components of known essential oils, as well as by comparing their retention indices with literature values (Adams, 2007;Aboaba et al, 2010).…”

Screening and Evaluation of Bioactive Components of Methanol Root Extract of Anthocleista nobilis G. Don. by GCMS Analysis

“…The compound were identi ed by comparison of their retention indices (RI) with those provided in NIST library. Identi cation was assumed when a good match of RI was achieved (Khan et al, 2016).…”