Oxygenated acids of the reserve lipids of Rumex paulsenianus

The composition of the fatty mono- and dihydroxy acids of the fruit ofRumex paulsenianus Rech. fil. (familyPolygonaceae) has been determined by a combination of IRS, UVS, GLC, and mass-spectrometric methods. (22) Monohydroxy acids of the C₁₄–C₂₀ series, including isomers and isologues, and four dihydroxy acids from C₁₈ to C₂₀, including a new isomeric 9-OH-10, 12–17:2 acid have been detected.Institute of the Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 762–765, November–December, 1991.     

Alkaloids of Stephania hernandifolia VIII. Methylhernandine

Summary A new hasubanan alkaloid with the composition C₂₀H₂₇O₆N, mp 152–153°C (ether-methanol) has been isolated from the herbStephania hernandifolia and has been called methylhernandine. The alkaloid has been shown to be identical with the methylamino alcohol obtained in the hydrolysis of hernandifoline.All-Union Scientific Research Institute of Medicinal Plants. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 455–457, July–August.     

Chromatopolarographic determination of the alkaloids from the seeds ofHaplophyllum perforatum

Summary 1. The polarographic behavior of haploperine, haplopine, haplophyllidine, and perforine in Britton-Robinson buffer solutions and in (C₂H₅)₄NOH solutions has been studied. Optimum conditions for their quantitative determination in solutions within the range of concentrations from 5×10^–4 to 1×10^–2 M have been found.2. A method for the separate quantitative determination of the alkaloids in the seeds ofH. perforatum has been developed.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 5, pp. 333–337, 1966     

Alkaloids of Sophora alopecuroides tricrotonyltetramine

Summary From the fraction of strong bases ofSophora alopecuroides (flowering stage) a base C₁₂H₂₄N₄, mp 101–103°C, has been isolated which has been identified as tricrotonyltetramine. Its stereoconfiguration has been established.All-Union Scientific-Research Institute of Medicinal Plants. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 752–754, November–December, 1974.     

Natural quinones

Summary A new anthraquinone of composition C₁₇H₁₄O₅, mp 182–183° (decomp., from benzene) has been isolated from the roots ofRubia iberica (Fisch. ex D.C.); it has been called ibericin and has the structure of 1, 3-dihydroxy-4-ethoxy-methylanthraquinone.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 1, pp. 12–15, 1966     

Development of a method for determining bornyl acetate in the products of the processing of Abies sibirica

Summary The conditions for the reaction of esters—bornyl acetate—with an alkaline solution of hydroxylamine have been studied by the method of steepest ascent. A method has been developed for determining esters in a CO₂ extract ofAbies sibirica.Krasnodar Scientific-Research Institute of the Food Industry. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 303–306, May–June, 1976.     

Investigation of a CO2 extract of the fruit of Capsicum annuum

Summary The composition of a CO₂ extract of the fruit of the pepperCapsicum annuum L. with respect to the main classes of compounds has been studied. A method has been developed for the extraction and quantitative determination of capsaicine.Krasnodar Scientific-Research Institute of the Food Industry. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 481–485, July–August, 1974.     

Synthesis of polypeptides with the sequences-Gly-Gly-Ala-, -Gly-Gly-Lys(Tos)-, and-Gly-Gly-Glu(OCH3)- and the influence of triethylamine on the degree of their polycondensation

Summary From the herbGlaucium flavum have been isolated O-methylatheroline, sinoacutine, and a new alkaloid of the aporphine series, C₂₀H₁₇NO₅, which has been called glauvine.A structural formula has been proposed for glauvine on the basis of chemical reactions and spectral information.All-Union Scientific-Research Institute of Medicinal Plants. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 214–218, March–April, 1972.     

Coumarins of Fraxinus mandschurica and F. potamophila

Summary The leaves ofFraxinus mandschurica Rupr. and the bark ofF. potamophila Herd. have yielded esculetin, fraxinol, and a new coumarin C₁₀H₈O₅, mp 228–230°C which we have called isofraxetin. On the basis of NMR and UV spectroscopy it has been established that isofraxetin is 5,7-dihydroxy-7-methoxycoumarin.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Institute of Chemistry, Academy of Sciences of the Turkmen SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 493–497, July–August, 1973.     

Co-hydrolysis products of tetraethoxysilane and methyltriethoxysilane in the presence of tetramethylammonium ions: Part 2 [1]

²⁹Si NMR peaks due to species with the double four-membered ring siloxane backbone composed of both Si(O^–)_4/2 and CH₃Si(O^–)_3/2 units, (CH₃) _n Si₈O _{20 – n} ^{/(8 – n) –} (n=1–3), formed by co-hydrolysis of tetraethoxysilane and methyltriethoxysilane in the presence of tetramethylammonium ions in methanol have been assigned. It has been found that ²⁹Si NMR peaks due to Si(OSi)₃(O^–) units shift to lower frequencies by replacement of the adjacent Si(O^–)_4/2 units by CH₃Si(O^–)_3/2 units, in other words, with increasing m value in Si[OSi(O^–)₃]_{3 – m} [OSi(CH₃) (O^–)₂] _m (O^–) (m=0–2). Peaks from CH₃ Si(OSi)₃ units in the species have also appeared as separated due to the kind of neighbor structural units. On the basis of the assignments, positions of CH₃Si(O^–)_3/2 units in the cubic octameric siloxane framework of (CH₃) _n Si₈O _{20 – n} ^{/(8 – n) –} (n=2, 3), for both of which three isomers are present, have been estimated.     

General characteristics of the polysaccharides of brown algae

Summary From an acetonic extract of the roots ofFerula samarcandica Kor. have been isolated farnesiferol A, gummosin, and two new coumarin substances, samarcandin C₂₄H_30–32O₅ and samarcandone C₂₄H_28–30O₅. Samarcandin has been converted into samarcandone and their probable structures-I and II-have been established.Khimiya Prirodnykh Soedinenii, Vol. 4, No. 2, pp. 73–77, 1968     

A new plant growth regulator of microbial origin

A new plant growth regulator — an inhibitor of the germination of mustard seeds — has been isolated from a culture filtrate of a phytopathogenic fungus of the genusPhoma. The methyl and trimethylsilyl derivatives of this compound have been obtained. Its empirical formula — C₁₆H₂₂O₅ — has been determined. On the basis of the results of IR and NMR spectroscopy and mass spectrometry, the compound isolated has been assigned the structure of 3,5-dihydroxy-2-octanoylphenylacetic acid.All-Union Scientific-Research Institute of Applied Molecular Biology and Genetics. V. I. Lenin Academy of Agricultural Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii No. 3, pp. 387–391, May–June, 1985.     

The structure of pediculidine

Summary A new alkaloid pediculidine, C₁₀H₉NO, mp 74–75°C, has been isolated from the ethereal fraction of the combined alkaloids ofP. olgae. Structure (I) has been proposed for the new alkaloid on the basis of its UV, IR, NMR, and mass spectra.Order of the Red Banner of Labor Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 304–306, May–June, 1971.     

Lucidin primeveroside fromRubia iberica. II

Conclusions A new anthraglycoside with the composition C₂₆H₂₈O₁₄ and mp 210–212°C, lucidin primeveroside, has been isolated from the roots ofRubia iberica C. Koch.Khimiya Prirodnykh Soedinenii, Vol. 4, No. 5, pp. 273–277, 1968     

A sesquiterpene lactone badkhysinin from the roots ofFerula oopoda

Summary A sesquiterpene lactone with the composition C₂₀H₂₄O₅, mp 104°–105° C, []_D –212.4° C (alcohol) has been isolated from the roots ofFerula oopoda Boiss. and has been called badkhysinin. Badkhysinin is an ester of angelic acid and an epoxyhydroxylactone C₁₅H₁₈O₄ with mp 185°–186° C apparently related to guaianolide with a hydrocarbon skeleton of irregular structure. A number of possible structural formulas for badkhysinin are given.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 2, pp. 93–99, 1966     

Structure of isoregecoline

The structure of the alkaloid isoregecoline (I) with the composition C₁₉H₂₃O₄N⁺, mp. 284–286°C, isolated previously fromColchicum kesselringii Regel growing in the flood plains of the R. Chirchik has been established. It has been shown by IR, PMR and mass spectroscopy and chemical transformations that (I) is an epimer of regecoline isolated from a plant of the same species.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 808–810, November–December, 1985.     

The structures of chimganin and chimgin

Summary The roots ofFerula tschimganica Lipsky have yielded two new compounds with the compositions C₁₈H₂₄O₄ (mp 85°C) and C₁₇H₂₂O₃ (mp 155°C), which have been calledchimganin andchimgin. On the basis of their UV, IR, and NMR spectra and the products of alkaline hydrolysis, it has been shown that chimganin is the ester of 4-hydroxy-3-methoxybenzoic acid and chimgin that of 4-hydroxybenzoic acid with (+)-borneol.Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 59–63, January–February, 1972.