1Sonia Mol Joseph, 2Amala Dev A. R

 DOI : http://dx.doi.org/10.31142/ijahm/v11i3.02

1, 2 PG & Research Department of Chemistry, Mar Ivanios College (Autonomous), Thiruvananthapuram, Kerala

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Abstract:-

This study reports the comparison of chemical composition and antioxidant activity of leaf essential oil from two Annona species - Annona glabra and Annona reticulata by GC-MS method. Out of the forty-one compounds identified from essential oil analysis comprising 80.5% to 96.1% from A. reticulata and A. glabra. In A. glabra leaf oil, 27 compounds were identified whereas in A. reticulata leaf oil, 30 compounds were identified. Essential oil of A. glabra was dominated by diterpenoids whereas that of A. reticulata by sesquiterpenoids. E-nerolidol (26.9%) and spathulenol (16.7%) were the major constituents of A. glabra. But in A. reticulata, β-elemene (17.8%) and E-phytol (15.3%) were identified at higher concentrations. Diterpenoids (76.3%) and sesquiterpene hydrocarbons (43.7%) were the major class of compounds in A. glabra and A. reticulata respectively. Elemol (8.7%), β-Pinene (7.4%), α-Pinene (6.9%) and β-Elemene (5.3%) were some of the main compositions of A. glabra leaves whereas β-Caryophyllene (7.9%), α-Pinene (7.7%), Spathulenol (5.5%) and β-Pinene (5.1%) were the major constituents in A. reticulata leaves. Antioxidant activity was not detected by the DPPH assay for both the oils evaluated. Results of the GC-MS analysis supported the fact that these essential oils may become useful in the research of new therapeutic agents of promising clinical use.

Keywords: Essential oil , Annona species, Diterpenoids, Sesquiterpenoids, Therapeutic agents

 

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