Poster presentation
77
FATTY ACIDS AND ESSENTIAL OILS FROM AERIAL PART OF
Ferula kyzylkumica - AN ENDEMIC PLANT OF UZBEKISTAN
D. Т. Asilbekova, Kh.M. Bobakulov, A.M. Nigmatullaev
S. Yu. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences
of the Republic of Uzbekistan, 77 M. Ulugbek St., Tashkent, 100170, Uzbekistan,
e-mail: dasil@rambler.ru
There are about 40 species of wild
Ferula
(Apiaceae family) in our region. Seven of
its species,
including the
Ferula kyzylkumica
Korovin is listed in the Red Book of
Uzbekistan. This species is a polycarpic plant and a rare endemic of the remnant
mountains of Kyzylkum. The objectives of this
report were focused on the
determination of the of fatty acid compositions of lipids
and essential oil components
isolated from the aerial part of
F. kyzylkumica
Korovin.
Air-dried aerial part (100 g)
was ground in a coffee grinder. Essential oil (0.0103 g)
from half of plant material (50 g) was isolated by hydro distillation.
For isolation of
lipids second part of material (50.0 g) extracted with chloroform – methanol (5 x 100
mL) by Folch method. All extracts were combined, was worked up beforehand with
aqueous CaCl
2
solution (0.04%) to remove non-lipid components constituents. Extract
evaporated and lipids underwent alkaline hydrolysis to isolate fatty acids.
Fatty acids
(0.565 g) convert to methyl esters by treatment with freshly prepared diazomethane
solution in Et
2
O. The conditions for all chemical and GC-MS, GC-FID analyses over
columns with НР-5 and HP-INNOWax (respectively fatty
acid methyl esters and
essential oil) were analogous as before [1].
The yield of essential oil from aerial part of
F. kyzylkumica
was 0.23% of the dry
plant material. The results by GC-MS analysis indicated that
the main constituents of
the essential oil compounds were the sesquiterpene hydrocarbons δ-cadinene,
germacrene B and D, α-muurolene as well as oxygenated sesquiterpenes such as α-
cadinol, T-cadinol and germacrene-D-4-ol. The content of monoterpenes in the essential
oil is low.
Identified acyl fragments of the lipids were dominated by unsaturated constituents
with linolenic and linoleic acids as the main ones, but oleic acid was significantly less.
The major saturated acid of the 12:0−22:0 series was hexadecanoic acid. This acid was
also identified among the volatile compounds of this plant.
Thus, essential oil and fatty acid profiles of
F. kyzylkumica
were studied for the first
time.
Reference:
D. T. Asilbekova, G. Ozek, T. Ozek, Kh. M. Bobakulov, A. M. Nigmatullaev, Sh.
Sh. Sagdullaev,
Chem. Nat. Compd.
, 58, 217–221 (2022).