Structures of dictysine and dehydrodictysine

From the results of an x-ray structural analysis of free dictysine it has been established that dictysine is an alkaloid of the denudatine type with an, , -triol system at C₁₅, C₁₆, and C₂₀. The structures of the acetonides of dictysine and dehydrodictysine formed from dictysine and dehydrodictysine, respectively, in the process of separating the combined alkaloids, have been shown.Institute of the Chemistry of Plant Substances, Academy of Sciences of Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 86–91, January–February, 1982.     

Structures of dictysine and dehydrodictysine

From the results of an x-ray structural analysis of free dictysine it has been established that dictysine is an alkaloid of the denudatine type with anα, β, γ-triol system at C₁₅, C₁₆, and C₂₀. The structures of the acetonides of dictysine and dehydrodictysine formed from dictysine and dehydrodictysine, respectively, in the process of separating the combined alkaloids, have been shown.     

The structure of karakoline

Summary We have isolated from the tubers ofAconitum karakolicum collected in the Kirghiz SSR, Kungei Alatau range, songorine, napelline, a base with mp 159–160°C, and the new alkaloids karakoline and a base with mp 222–224°C.The results of a study of the chemical reactions and spectral characteristics of karakoline have shown that it consists of a lycoctonine skeleton with N-ethyl and C₄-methyl groups, hydroxyls at C₁, C₈, and C₁₀ and a methoxy group at C₁₅.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 199–205, March–April, 1973.     

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.     

Structure of dictysine

The results are given of an investigation of the structure of the new diterpene alkaloid dictysine C₂₁H₃₃NO₃ isolated from the epigeal part ofDelphinium dictyocarpum DC. On the basis of the results of a study of chemical and spectral characteristics, dictysine has been shown to have the sengorine skeleton, with hydroxy groups at C₁₅, C₁₆, and C₂₀.     

The isocoumarin artemidinal from Artemisia dracunculus

Summary Artemidinal, C₁₀H₆O₃, which is isocoumarin with an aldehyde group at C₃, has been isolated from the epigeal part ofArtemisia dracunculus.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. 257–259, May–June, 1971.     

A chemical study ofPlectranthus glaucocalyx Maxim.

Summary A previously unknown crystalline substance C₂₀H₂₈O₄, calledplectrin, has been isolated from the leaves ofPlectranthus glaucocalyx Maxim., family Labiatae.Khimiya Prirodnykh Soedinenii, Vol. 1, No. 6, pp. 427–428, 1965     

Corumdephine — A new alkaloid fromDelphinium corumbosum

The epigeal part ofDelphinium corumbosum Rgl., collected in the flowering phase in the environs of Pokatilovka (Dzhungarian Ala-Tau) has yielded — in addition to the known alkaloids methyllycaconitine, lycoctonine, delcorine, deoxydelcorine, delcoridine, dehydrodelcorine, dephatine, browniine, dictysine, and dictysine acetonide — a new diterpene alkaloid with the composition C₂₅H₃₉NO₆ (I), which has been called corumdephine. The structure of corumdephine has been established on the basis of a passage from (I) to deoxydelcorine and spectral characteristics.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 95–98, January–February, 1985.     

Investigation of Aconite alkaloids

Summary The composition of the alkaloids in plants of the genus Aconitum —A. kirinense,A. altaicum, A. coreanum, andA. nemorosum — has been studied. Four new alkaloids of composition C₂₆H₄₁O₈N·HNO₃, C₃₅H₄₁O₁₀N·HBr, C₂₀H₂₅O₃N, and C₂₃H₂₉O₆N have been isolated.Khimiya Prirodnykh Soedinenii, Vol. 1, No. 2, pp. 113–116, 1965.     

The structure of gummosin

Summary From the neutral fraction of an acetone extract of the roots of plants of the genusFerula,F. gummosa Boiss.,F. pseudoreoselinum Rgl. et Schmalh. (K-Pol.) andF. Samarkandica Eug. Kor., we have isolated a coumarin gummosin with the composition C₂₄H₃₀O₄, mp 176–177°C, [a]_D –54°C. The structure of gummosin corresponds to formula (III).With respect to structure, gummosin is a spatial isomer of farnesiferol A; it differs from the latter by the fact that the secondary OH group in gummosin is axial.Khimiya Prirodynkh Soedinenii, Vol. 2, No. 6, pp. 383–387, 1966     

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.     

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     

Diterpenoids fromMarrubium peregrinum. I

Summary Two new diterpenoids have been isolated fromMarrubium peregrinum L.: a bicyclic diol C₂₀H₃₆O₂, peregrinol — and a hydroxyketolactone C₂₀H₂₅O₅, peregrinin. A substance C₁₉H₁₈O₆ has been obtained as a by-product.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 4, pp. 249–251, 1966     

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.     

An isomer of coronopilin

Conclusions From the racemes ofC. xanthifolia Fresen. have been isolated a sesquiterpene lactone C₁₆H₂₀O₄, the structural (+)-isomer of (–)-coronopilin, which has not been studied previously; structure I has been proposed for it.Khimiya Prirodnykh Soedinenii, Vol. 5, No. 5, pp. 375–377, 1969     

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.     

Structure of fegolide

A chloroform extract of the seeds ofFerula penninervis Rgl et Schmahl has yielded a new sesquiterpene lactone of the guaiane type — fegolide: C₂₀H₂₈O₅, mp 165–166°C []_D –150°C (c 0.17; chloroform).Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 335–337, May–June, 1985.