Structure of artabin

Summary FromArtemisia absinthium L. a new sesquiterpene lactone of the germacrane type — artabin — has been isolated. Structure I is proposed for it.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedineii, No. 6, pp. 691–694, November–December, 1970.     

A method for the quantitative determination of vincamine in the epigeal part of Vinca erecta

Summary An extraction-photometric method for the determination of vincamine in its raw material — the epigeal part ofVinca erecta — has been developed.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 65–66, January, 1971.     

The structure of teucrin A

Summary The structure of a new 18-norditerpenoid — teucrin A, isolated from the plantTeucrium chamaedrys L. — has been demonstrated. It has been shown that it belongs to the furolactones with a rearranged labdane skeleton.Institute of Chemistry, Academy of Sciences of the Moldavian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 31–35, January–February, 1973.     

Isolation of hemigossypol quinone from a cotton plant infected with wilt

Summary From the stems of the cotton plant infected with the fungusVerticillium dahliae Kleb. has been isolated a quinone derivative of hemigossypol — hemigossypolone — for which the structure 8-formyl-6,7-dihydroxy-5-isopropyl-3-methyl-1,4-naphthoquinone is proposed, and its fungitoxicity has been determined.Division of Bioorganic Chemistry of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 341–344, May–June, 1977.     

Synthesis of (E)-dodec-3-en-1-yl acetate — The main component of sex pheromones of Scrobipalpa ocellatella and Scrobipalpopsis solanivora

(E)-Dodec-3-en-l-yl acetate — the main component of the sex pheromones ofScrobipalpa ocellatella andScrobipalpopsis solanivora — has been obtained by a three-stage synthesis from decanal and malonic acid. The overall yield of pheromone was 33% calculated on the initial aldehyde.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 682–683, September–October, 1988.     

The structures of tenuferin,tenuferinin, and tenuferidin

Summary Three new substances — tenuferin, tenuferinin, and tenuferidin — have been isolated from the roots ofFerula tenuisecta Eug. Kor. It has been shown that they are esters of an undescribed sesquiterpene alcohol — 8,10-dihydroxy-3,4-epoxyguaiane — and isovanillic, vanillic, and p-hydroxybenzoic acids, respectively.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodynkh Soedinenii, No. 1, pp. 70–75, January–February, 1978.     

The structure of vincarinine

Summary 1. A new base — vincarinine — has been isolated from the epigeal part ofVinca erecta Rgl. et Schmalh.2. On the basis of spectral characteristics and a comparison of some chemical reactions of vincaricine and vincarinine, the structure of vincaricin-16-al has been established for the latter.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 164–166, March, 1971.     

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.     

Phytoecdysteroids of plants of the genus Melandrium I. Polypodin B 22-acetate from Melandrium turkestanicum

Known ecdysteroids — ecdysterone, ecdysterone 22-acetate, polypodin B, integristerone A, and sileneosides A and D — and a new phytoecdysteroid — polypodin B 22-acetate — have been found in the epigeal parts of the plantMelandrium turkestanicum (Rg1.) Vved. (family Caryophyllaceae).Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–483, July–August, 1990.     

Synthesis of dodec-5E-en-1-ol — The pheromone of Tricimba cincta — And tetradec-5E-1-yl acetate — An imitator of the pheromone of Rhynchopacha sp.

On the basis of a modified Knoevenagel reaction starting from octanol and decanal, the stereodirected synthesis has been effected of dodec-5E-en-ol (the pheromone of the grass flyTricimba cincta — and tetradec-5E-en-yl acetate) an imitator of the pheromone of the mothRhynchopacha sp. A. S. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 129–132, January–February, 1991.     

The structure of tanapsin

Summary A new eudesmanolide-tanapsin—has been isolated from the flower heads ofTanacetum pseudoachillea C. Winkl. On the basis of spectral characteristics and chemical transformations it has been established that tanapsin has the structure of 6-angeloyloxy-1,4-dihydroxyeudesm-11(13)-en-8,12-olide.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 309–312, May–June, 1976.     

Triterpene glucosides of Dipsacus azureus. III. Structure of dipsacobioside

A new triterpene glycoside — dipsacobioside — has been isolated from the root of theDipsacus azureus Schrenk. By chemical transformation and spectral methods its structure has been established as hederagenin 3-O-[O--L-rhamnopyranosyl-(14)--L-arabinopyranoside].Institute of Organic Chemistry, Kirgiz SSR Academy of Sciences, Frunze. Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 204–207, March–April, 1989.     

Triterpene glycosides and their genins fromThalictrum foetidum. II. The structure of cyclofoetigenin A

A glycoside isolated from the epigeal parts ofThalictrum foetidum (Ranunculaceae) has yielded a new genin — cyclofoetigenin A, the structure of which has been established on the basis of chemical transformations and spectral characteristics as 24S-cycloartane-3,16,25,25-tetraol.Irkutsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 370–375, May–June, 1985.     

Ribose in the triterpene glycosides of Clematis vitalba. I

Summary 1. It has been shown that the roots ofClematis vitalba contain free hederagenin and oleanolic acid and also eight glycosides of these aglycones.2. It has been established that vitalbosides F, G, and H contain in their carbohydrate moiety an unusual monosaccharide for saponins — ribose.Order of the Red Banner of Labor Institute of Chemistry of the Academy of Sciences of the Moldavian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 297–299, May–June, 1971.     

Foliosidine acetonide

Summary Foliosidine acetonide has been isolated from the mixture of alkaloids fromH. foliosum.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 724–727, November–December, 1970.     

Triterpene glycosides of Astragalus and of their genins. X. Cyclogalegigenin from Astragalus galegiformis

The flowers of the plantAstragalus galegiformis L. have yielded a new isoprenoid — cyclogalegigenin — the structure of which has been established on the basis of chemical transformations and spectral characteristics as 20R,24S-epoxycycloartane-3,6,16,25-tetraol.I. G. Kutateladze Institute of Pharmacochemistry, Academy of Sciences of the Georgian SSR, Tbilisi. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 332–339, May–June, 1983.     

Phytoecdysteroids of plants of the genus Silene. IX. Ecdysterone 22-O-benzoate from Silene scabrifolia

An ecdysteroid which has proved to be ecdysterone 22-O-benzoate has been isolated from the epigeal organs ofSilene scabrifolia Kom.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 77–80, January–February, 1986.