STUDY OF CHEMICAL COMPOSITION OF Dracocephalum paulsenii PLANT S.F. Aripova 1 , D.U. Khasanov 2 , S.A. Maulyanov 2 , I.J. Jalolov 3 1) S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of the Republic of Uzbekistan st. Mirzo-Ulugbek, 77, 100170 Tashkent e-mail: Salima_aripova@mail.ru
2) National University of Uzbekistan 3) Fergana State University The aerial part of
Dracocephalum paulsenii plant was extracted with 70% EtOH. The
extract was absorbed on silica gel (1:1) and placed in a column for CC. The column was
eluted with solvents in the following order: benzene, CHCl
3
, EtOAc, EtOAc:EtOH
(8:2). Ethylacetate eluate was fractionated in the CHCl
3
: MeOH gradient system.
During the fractionation process, 2 individual flavonoids were isolated for the first time
from this plant growing in Uzbekistan [1]. Spectrum of these flavonoids were taken in
the NMR spectrometer and their structure was identified. The resulting flavonoids were
found to be apigenin (a) and luteolin (b) [2]. The resulting EtOAc:EtOH (8:2) mixture
was chromatographed on a Sephadex LH-20 column eluting with 80% EtOH to get 62
fractions (frs. F1 to F62). Frs. F14 to F25 combined and chromatographed on a
Sephadex LH-20 column, eluting with EtOH 80 % to obtain 30 fractions (frs. F14/25-1
to F14/25–30). During elution, 2 individual flavonoids 4.3 mg of apigenin-5-galactoside
(c) and 6.2 mg of luteolin-5-galactoside (d) were isolated:
Flavonoids (a,b,c,d) have been isolated from the plant
Dracocephalum paulsenii first
time.
References :
1. Vvedenskiy A.I. Flora of Uzbekistan, V. 5. Tashkent. 1961, P. 309-310.
2.
D. N. Olennikov, N. K. Chirikova, Z. M. Okhlopkova and I. S. Zulfugarov.
Molecules 2013, 18, 14105-14121; doi:10.3390/molecules181114105.
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a
b
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d