Triterpene glycosides of Astragalus and their genins. XXXVIII. Cycloalpigenin D and cycloalpioside D from Astragalus alopecurus

Eight compounds of triterpenoid nature have been isolated from the epigeal parts of the plantAstragalus alopecurus Pall. (Leguminosae) and have been designated in order of increasing polarity as substance 1–8. On the basis of chemical transformations and spectral characteristics, we have established the structures of 4 and 8, which have been called cycloalpigenin D and cycloalpioside D, respectively. Cycloalpigenin D is 20R,24S-epoxycycloartane-3,7,16,25-tetraol. Cycloalpioside D is cycloalpigenin D 3-O--D-xylopyranoside.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 377–384, May–June, 1991.     

Isolation and identification of a trail attractant for the termite Reticulitermes lucifugus from the plant Zizyphus jujuba

Two trail attractants for the termiteR. lucifugus have been isolated from the plantZizyphus jujuba: - and -bisabolenes. The threshold concentrations of the actions of these substances amounts to 10^–9 g/liter. -Bisabolene in the range of concentrations of 1–10^–6 g/liter is a powerful repellant for termites.Institute of Physiologically Active Substances, Academy of Sciences of the USSR, Chernogolovka. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 416–419, May–June, 1989.     

Coumarin composition of the roots, stems, and fruit of Prangos lophoptera

Summary The coumarin composition of the roots, stems, and fruit ofPrangos lophoptera has been studied; in addition to known coumarin derivatives two new compounds have been isolated and have been calledisogosferol (XIII) andlophopterol (XIV).On the basis of a study of the IR, mass, and NMR spectra, and chemical properties of the latter, the most probable structure of 6-(3-hydroxy-1,2-ethoxyisopentyl)-7-methoxycoumarin has been proposed for it.Leningrad Sanitary-Hygienic Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 708–710, November–December, 1974.     

Pinusolide, a new diterpenoid from Pinus sibirica and P. korsensis

Conclusions From the neutral fraction of the oleoresin ofPinus sibirica R. Mayr andP. koraensis Sieb. et Zucc. a new diterpenoid has been isolated which we have called pinusolide, whose structure has been shown to be that of methyl labd-8(20)-1,3-dien-16,15-olid-19-oate.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 541–545, September–October, 1970.     

Flavonolignans of Salsola collina

The new flavonolignans salcolin A [threo-4-O-(-guaiacylglyceryl)tricin] and salcolin B [erythro-4-O-(-guaiacylglyceryl)tricin] have been isolated from the epigeal part ofSalsola collina Pall. (familyChenopodiaceae). The structures of the flavonolignans have been established on the basis of the results of NMR and mass spectrometry.Irkutsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 182–186, March–April, 1992.     

Alkaloids of the leaves of Cocculus laurifolius the structure of coclafine

Cocculine, isoboldine, norisoboldine, and a new erythrinan alkaloid, coclafine, for which the structure and absolute configuration of 3S,5R-3,15-dihydroxyerythrin-1(6)-ene have been established, have been isolated from the leaves ofCocculus laurifolius DC.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Tashkent Agricultural Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 84–86, January–February, 1991.     

Alkaloids of Nitraria komarovii. XI. Structure of komavicine and the products of the dehydrogenation of the nitrarine method of dehydrogenation in the quinolinyl-β-carboline series

The new alkaloid komavicine has been isolated from the epigeal part ofNitraria komarovii, and its structure has been established on the basis of spectral characteristics and chemical transformations. The products of the dehydrogenation of nitrarine with selenium and sulfur have been studied. A method has been developed for the dehydrogenation of dihydro and tetrahydro derivatives in the quinolinyl--carboline series.Institute of Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 33–39, January–February, 1993.     

Alkaloids of Ziziphus jujuba the structure of juziphine and juzirine

Summary Six bases have been isolated from the leaves of the plantZiziphus jujuba Mill. family Rhamnaceae, cultivated in Tashkent: coclaurine, which has been isolated previously, and isoboldine, norisoboldine, asimilobine, which have been isolated for the first time, and the new juziphine and juzirine. It has been established that juziphine has the structure of 8-hydroxy-1R-(4-hydroxybenzyl)-7-methoxytetrahydroisoquinoline, and juzirine that of 7-hydroxy-1-(4-hydroxybenzyl)-6-methoxyisoquinoline.Juziphine has also been isolated from the epigeal part ofCorydalis gortschakovii.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 239–243, March–April, 1977.