Abstract

The water distilled essential oils and n-hexane extract of Zosimia absinthifolia (Vent.) Link. (family: Umbelliferae) growing in Khalkhal, North-west Iran were analyzed by GC and GC-MS. The yields were: 0.2 % and 0.7 % (v/w) for essential oil and n-hexane extracts, respectively. Twenty-one compounds representing 96.0 % of the distilled oil of Z. absinthifolia were identified, among them octyl acetate (24.7 %), β-caryophyllene (22.2 %), cis-β-ocimene (8.9 %), α-pinene (5.3 %), clovane (5.3 %) and β-gurJunne (4.6 %) were the major constituents. The extracts was characterized by higher amount of butyl octanoate (31.4 %), octyl acetate (29.7 %), 6-methoxy-1- indanone (12.2 %) and osthol (4.4 %), sixteen components comprising 95.1 % of the total oil were detected in the extract. The oil obtained by hydrodistillation method consist mainly of aliphatic oxygenated and sesquiterpene constituents, whereas the extracts contain mainly aliphatic ester compounds.

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