14-Methylisotalatisidine — A new alkaloid from Delphinium confusum

The known alkaloids isotalatisidine, nevadensine, delcosine, delsoline, and isobaldine have been isolated form the epigeal part ofDelphinium confusum M. Pop., collected in the flowering period, and also a new alkaloid with the composition C₂₄H₃₉NO₅, mp 136–137°C (acetone), for which the structure of 14-methylisotalatisidine has been established on the basis of spectral characteristics and of passages from condelphine and isotalatisidine. This is the first time that the alkaloids nevadensine, delcosine, delsoline, isobaldine, and 14-methylisotalatisidine have been isolated from this plant.     

A reinvestigation of the structures of acomonine,iliensine, 14-dehydroiliensine,and 14-benzoyliliensine

The novel structures assigned by Yunusov et al to the C₁₉-diterpenoid alkaloids, acomonine ($\text{1}$), iliensine ($\text{2}$), 14-dehydroiliensine ($\text{3}$), and 14-bensoyliliensine ($\text{4}$) have been found to be in error. We have demonstrated that these alkaloids are identical with the well-known alkaloids, delsoline ($\text{5}$), delcosine ($\text{6}$), 14-dehydrodeloosine ($\text{7}$), and 14-benzoyldelcosine ($\text{8}$), respectively.     

Alkaloids ofAndrachne rotundifolia

Summary 1. The content of total alkaloids in the hypogeal parts ofAndrachne rotundifolia C. A. Mey. (family Euphorbicease) is 0.2–0.3% and in the epigeal parts 0.06–0.08%.The total alkaloids in both the hypogeal and the epigeal parts ofAndrachne rotundifolia consist of five or six non-phenolic bases.2. Three individual substances have been isolated: andrachnine C₁₁H₁₇NO₂, which is a new alkaloid; base (II), giving a perchlorate with mp 139°–140° C; and base (III) with mp 135°–136° C.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 4, pp. 257–260, 1966     

The biosynthesis of the alkaloids of Goebelia pachycarpa

Summary 1. Qualitative and quantitative compositions of the main alkaloids in five development phases of theGoebelia pachycarpa C. A. Mey. have been determined.2. The radioactivities of the alkaloids isolated after feeding the plant with assumed precursors -[2-¹⁴C] lysine and [1,5-¹⁴C] cadaverine — show that vigorous synthesis of alkaloids takes place in the flowering and budding periods.3. The results of an investigation of the oxidation products and of the alkaloids introduced and isolated after the feeding of plants with labelled matrine and labelled sophocarpine show that the alkaloids undergo interconversion without intramolecular changes.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh, Soedinenii, No. 4, pp. 549–552, July–August, 1977.     

The polybuffer separation of the alkaloids of Vinca erecta

Summary By separating the total alkaloids ofV.erecta according to their basicities in an APS, in addition to bases known previously we have isolated ervincidine, apovincamine, (+)-quebrachamine, dl-eburnamine, (–)-1,2-dehydroaspidospermidine, and kopsanone. This is the first time that these alkaloids have been obtained from this plant. Thin-layer chromatography showed the presence of another 10–12 uncharacterized alkaloids.The region of the passage into the buffer solutions of some alkaloids has also been established.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 713–717, November–December, 1970.     

An investigation of the alkaloids of Ammothamnus lehmanni the structure of lehmannine

Summary 1. The qualitative and quantitative composition of the combined alkaloids from the leaves, stems, seeds, and roots ofAmmothamnus lehmanni Bge. according to its vegetation periods have been studied.2. It has been found that the young plant contains predominantly the N-oxide forms of the matrine alkaloids, and as the plant develops these are reduced to the free bases.3. A new base lehmannine, C₁₅H₂₂ON₂ has been isolated for which 12,13-dehydromatrine is proposed as the most probable structure.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 377–380, May–June, 1975.     

Alkaloids of Rauwolfia species growing in Vietnam

Reserpine, ajmaline, serpentine, ajmalicine, isoreserpiline, and other alkaloids have been isolated from the roots ofRauwolfia cambodiana Pierre ex Pitard,R. verticillata Baill. andR. serpentina Benth.R. vomitoria Afz. was the richest in alkaloids.Leningrad Institute of Pharmaceutical Chemistry. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 813–816, November–December, 1991.     

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 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.