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1.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodynkh
Soedinenii, No. 6, pp. 880–882, November–December, 1988. 相似文献
2.
B. A. Imomnazarov M. I. Isaev S. S. Saboiev N. K. Abubakirov 《Chemistry of Natural Compounds》1990,26(5):555-558
A new triterpene glycoside of the cycloartane series, which has been called cyclocarposide, has been isolated from the epigeal
part of the plantAstragalus coluteocarpus Boiss. (Leguminosae). The structure of cyclocarposide has been established on the basis of chemical transformations and spectral
characteristics as 20R,24S-epoxycycloartane-3β,6α,16β,25-tetraol 6-0-α-L-rhamnopyranoside 3-0-α-D-xylopyranoside.
Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Pamir Biological Institute, Academy
of Sciences of the Tadzhik SSR, Khorog. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 653–656, September–October,
1990. 相似文献
3.
M. I. Isaev 《Chemistry of Natural Compounds》1991,27(4):457-459
The structure of a triterpene glycoside of the cycloartane series — cycloaraloside D, isolated from the roots ofAstragalus amarus Pall. (Leguminosae) — has been established on the basis of chemical transformations and spectral characteristics. Cycloaraloside
D is 20R, 24S-epoxycycloartane-3β, 6α, 16β, 25-tetraol 3-0-[0-α-L-rhamnopyranosyl-(1 → 2)-β-D-glucopyranoside].
Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh
Soedinenii, No. 4, pp. 526–528, July–August, 1991. 相似文献
4.
A new triterpene glycoside of the cycloartane series (cycloaraloside C) has been isolated from the roots of the plantAstragalus amarus Pall. (Leguminosae). Cycloaraloside C is a bioside of cyclosieversigenin including one D-glucose residue and one D-apiose
residue. The structure of the glycoside has been shown on the basis of the chemical transformations and spectral characteristics
as 20R,24S-epoxycycloartane-3β,6α,16β,25-tetraol 3-O-[O-(D-apio-β-D-furanosyl)-(1 → 2)-β-D-glucopyranoside]. This is the first
time that D-apiose has been found among cycloartane glycosides.
Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek, Tashkent. Translated from Khimiya Prirodnykh
Soedinenii, No. 6, pp. 783–787, November–December, 1990. 相似文献
5.
Galactomannan (yield 3.58% of seed mass) of molecular weight 876 kDa was isolated from seeds of Astragalus sericeocanus Gontsch. (Fabaceae). Its solutions had high viscosity [η], 764.6 mL/g, and optical density [α]D +65.3°. The polysaccharide consisted of galactose and mannose in molar ratio 1:1.58. The main chain of the galactomannan
macromolecule was constructed of 1,4-β-D-mannopyranose units, 63% of which were substituted at C-6 by single α-D-galactopyranose units. 13C NMR spectroscopy established that the galactomannan contained units of differently substituted galactose mannobiose units:
Man-Man, (Gal)Man-Man, and/or Man-Man(Gal) in addition to (Gal)Man-Man(Gal), the ratio of which was 0.15:0.51:0.34.
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 555–557, November–December, 2008. 相似文献
6.
Cycloadsurgenin, 20R,24 S-epoxycycloartan-6α,25-diol-3,16-dione, was partially synthesized in four steps from cyclosieversigenin. Side products with the structures 17E,24S-cycloart-17-en-6α,24,25-triol-3,16-dione and 17Z,24 S-cycloart-17-en-6α,24,25-triol-3,16-dione were obtained in addition to the desired product.
Presented at the 1st International Symposim on Edible Plant Resources and the Bioactive Ingredients, Xinjiang, China, July
25–27, 2008.
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 591–595, November–December, 2008. 相似文献
7.
M. D. Alaniya N. F. Chkadua T. I. Gigoshvili E. P. Kemertelidze 《Chemistry of Natural Compounds》2006,42(4):445-448
The new cycloartane glycoside cycloascauloside A with the structure 20S,24R-epoxycycloartan-3β, 6α,16β,25-tetraol 3-O-[α-L-rhamnopyranosyl(1→6)]-β-D-(2′-O-acetyl)-glucopyranoside was isolated from leaves of Astragalus caucasicus Pall. The structure was established based on IR, PMR, and 13C NMR spectra and physicochemical properties of the compound itself and the products of its chemical transformations.
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Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 359–361, July–August, 2006. 相似文献
8.
M. D. Alaniya N. Sh. Kavtaradze C. Bassarello A. V. Skhirtladze C. Pizza I. Kutateladze 《Chemistry of Natural Compounds》2006,42(6):681-685
New flavonoid oligosides, the structures of which were established by chemical transformations and UV, IR, PMR, and 13C NMR spectra, were isolated from Astragalus galegiformis leaves.
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Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 555–558, November–December, 2006. 相似文献
9.
Eyup Bagci 《Chemistry of Natural Compounds》2006,42(6):645-648
In this study, the fatty acid contents of some Astragalus L. (Fabaceae) species from Turkey were determined by GC and GC-MS techniques. The seed oils of Astragalus sp. (A. echinops Aucher ex. Boiss., A. subrobustos Boriss., A. jodostachys, Boiss. & Buhse., A. falcatus Lam., A. fraxinifolius DC.) contained linolenic (between 23–41.%), linoleic (23–37%), and oleic acids (8–19%) as the major components. Fatty acid
composition of the studied Astragalus taxa showed uniform fatty acid patterns. Palmitic and stearic acids were the major saturated fatty acids in the seed oils.
The amounts of unsaturated fatty acids were higher than saturated fatty acids.
Published in Khimiya Prirodnykh Soedinenii, No. 6, pp. 526–528, November–December, 2006. 相似文献
10.
The new cycloartane glycoside cyclogaleginoside D, which has the structure 25-O-β-D-glucopyranoside-20S, 25R-epoxycycloartan-3β, 6α, 16β, 25-tetraol 3-O-β-D-(2-O-acetyl)xylopyranoside was isolated from Astragalus galagiformis stems. The structure of the glycoside was established using chemical transformations and IR, PMR, and 13C NMR spectral data.
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Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 255–256, May–June, 2006. 相似文献
11.
A. I. Cheshuina 《Chemistry of Natural Compounds》1990,26(6):712-712
Leningrad Institute of Pharmaceutical Chemistry. Translated from Khimiya Prirodnykh Soedinenii, No. 6, p. 832, November–December,
1990. 相似文献
12.
Seeds of Astragalus cicer L. (Fabaceae) afforded a galactomannan (5.90% yield of seed mass) of molecular weight 1064 kDa, solutions of which had high
viscosity [η] 925.5 mL/g and optical activity [α]D +71.9°. The galactomannan consisted of galactose and mannose units in a 1:1.39 ratio. Physicochemical methods established
that the main chain of the polysaccharide consisted of 1,4-β-D-mannopyranose units substituted at 72% of the C-6 positions by single α-D-galactopyranose units. The content of variously substituted galactose mannobiose units Man–Man, (Gal)Man–Man/Man–Man(Gal)
and (Gal)Man–Man(Gal) in the galactomannan were 18.7, 19.8, and 61.5%, respectively. 相似文献
13.
N. N. Guzhva S. F. Dzhumyrko A. M. Kolpak V. P. Anisimova 《Chemistry of Natural Compounds》1992,28(6):625-625
Pyatigorsk Pharmaceutical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 6, p. 719, November–December, 1992. 相似文献
14.
Galactomannans with galactose:mannose ratios 1:1.48 and 1:1.33, [α]D +67.9 and +76.4°, [η] 870.3 and 1337.1 mL/g, and molecular weights 999 and 1549 kDa, respectively, were isolated in 0.59
and 4.65% yields (of seed mass) from seeds of Astragalus alpinus and A. tibetanus (Fabaceae). Physicochemical methods (CrO3 oxidation; methylation–GC/MS; IR, NMR, and 13C spectroscopy) found that the main polysaccharide chain consisted of 1,4-β-D-mannopyranose units substituted 67.5% (A. alpinus) and 75.2% (A. tibetanus) at the C-6 position by single α -D-galactopyranose units. The contents of mannobiose blocks Man–Man, (Gal)Man–Man/Man–Man(Gal), and (Gal)Man–Man(Gal) variously
substituted with galactose were according to 13C NMR spectroscopy 15.9, 55.5, and 28.6% in A. alpinus galactomannan and 9.9, 42.3, and 47.8% in A. tibetanus galactomannan. 相似文献
15.
In addition to β-sitosterol, cyclosieversigenin, and β-sitosterol β-D-glucopyranoside, the roots of the plantAstragalus amarus Pall. (Leguminosae) have yielded a new triterpene glycoside of the cycloartane series — cycloaraloside A, which has the structure
of 2OR,24S-epoxycycloartane-3β,6α,16β,25-tetraol 3-O-β-D-glucopyranoside.
Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh
Soedinenii, No. 6, pp. 806–809, November–December, 1989. 相似文献
16.
T. Kh. Naubeev K. K. Uteniyazov V. V. Kachala A. S. Shashkov 《Chemistry of Natural Compounds》2007,43(2):166-169
The known glycoside aleksandroside I and the new cycloartane glycoside cyclochivinoside B, 24S-cycloartan-3β,6α,16β,24,25-pentaol
3,25-di-O-β-D-glucopyranoside, were isolated from the aerial part of Astragalus chivensis. Their structures were established using chemical transformations and two-dimensional spectra (TOCSY, ROESY, HMBC, HSQC,
COSY).
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 138–140, March–April, 2007. 相似文献
17.
The new cycloartane glycoside cyclochivinoside C, 24S-cycloartan-3β,6α,16β,24,25-pentaol 3,16-di-O-β-D-glucopyranoside, was isolated from the aerial part of Astragalus chivensis. The structures of the isolated compounds were established by chemical transformations and PMR and 13C NMR spectra.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 460–462, September–October, 2007. 相似文献
18.
The new cycloartane glycoside cycloorbicoside D, which has the structure 23ξ,24ξ-cycloartan-3β6α,16β,23,24,25-hexaol 3-O-β-D-xylopyranoside,
was isolated from the aerial part of Astragalus orbiculatus Ledeb. (Leguminosae).
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Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 345–346, July–August, 2005. 相似文献
19.
Yu-Feng Hu Xian-Ming Zhang Chuan-Wei Jin Xiao-Ming Peng 《Journal of solution chemistry》2010,39(12):1828-1844
Viscosities were measured for the ternary aqueous systems NaCl–mannitol(C6H14O6)–H2O, NaBr–mannitol–H2O, KCl–mannitol–H2O, KCl–glycine(NH2CH2COOH)–H2O, KCl–CdCl2–H2O, and their binary subsystems NaCl–H2O, KCl–H2O, NaBr–H2O, CdCl2–H2O, mannitol–H2O, and glycine–H2O at 298.15 K. A powerful new approach is presented for theoretical modeling of the viscosity of multicomponent solutions
in terms of the properties of their binary solutions. In this modeling, the semi-ideal solution theory was used to associate
the solvation structure formed by each ion and its first solvation shell in a binary solution with the solvation structure
of the same ion and its first solvation shell in multicomponent solutions. Then, the novel mechanism proposed by Omta et al.
(Science, 301:347–349, 2003) for the effect of a single electrolyte on the viscosity of water was extended to describe the influence of solute mixtures
on the viscosity of water, including electrolyte mixtures, nonelectrolyte mixtures, and mixtures of electrolytes with nonelectrolytes.
The established simple equation was verified by comparison with measured viscosities and viscosities reported in literature.
The agreements are very impressive. This formulation provides a powerful new approach for modeling this transport property
in solutions. It can stimulate further research in establishing a dynamical analogue to that formulated for the thermodynamics
of multicomponent solutions. It is also very important for the study of hydration of ions. 相似文献
20.
Neoflavone β-D-glucopyranosides, β-D-galactopyranosides, β-D-xylopyranosides, and α-D-arabinopyranosides were synthesized
by Michael condensation of potassium salts of 7-hydroxy-4-arylcoumarins with acetobromosugars followed by deacetylation of
the resulting peracetates.
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Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 546–550, November–December, 2005. 相似文献