Triterpenoids from Abies species

Three new triterpenoid acids have been isolated from an ethereal extract of Siberian fir needles, and the structures of their methyl esters have been established on the basis of spectral characteristics.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 212–219, March–April, 1989.     

Fractionation and amino acid compositon of proteins of the woody verdure of sea buckthorn

The woody verdure of sea buckthorn is rich in protein substances. Among the soluble proteins, water- and alkali-soluble fractions predominate. The presence of 17 amino acids in the water-soluble proteins has been established. The sum of the essential amino acids amounts to 42.12–49.51%. The water-soluble proteins of the woody verdure of sea buckthorm possess a high biological value.Siberian Technological Institute, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 409–412, May–June, 1988.     

Triterpenoids from Abies species. IV. New triterpene acids from the needles of Abies sibirica

Four new triterpene acids of the mariesiic acid series have been isolated from an extract of the needles of the Siberian fir in the form of their methyl esters, and their structures have been established on the basis of chemical transformations, spectral characteristics, and x-ray structural analysis.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 824–831, November–December, 1987.     

Quantitative composition of the resin acids produced by the coniferous species of the USSR

Conclusions 1. The chemical composition of mixtures of resin acids isolated from the balsams of native conifer species, Scotch, Crimean, and Siberian pines andP. hamota andP. pityusa, Norway spruce, and Siberian larch, has been studied by the GLC method.2. The following resin acids are present in the balsams: pimaric, sandaracopimaric, levopimaric, palustric, isopimaric, abietic, dehydro- and dihydroabietic, neoabietic, four acids of undetermined chemical structure, and fatty acids. The balsams differ in the quantitative composition of the resin acids that they contain.Institute of Physical Organic Chemistry, Academy of Sciences of the Belorussian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 539–541, September–October, 1970.     

O-acylated lignans from the wood of Abies species

Summary From the wood of the Siberian firAbies sibirica Ledeb. and the Khingan firA. nephrolepis Maxim., five new compounds have been isolated which are ester derivatives of the lignans lariciresinol, olivil, and hydroxymatairesinol.It has been established that olivil is esterified at the primary alcoholic hydroxyl by hydroxycinnamic acids — p-coumaric or ferulic — and lariciresinol is esterified by vanillic acid. A representative of the guaialignanolides — hydroxymatairesinol — is esterified at the secondary aliphatic hydroxy group with p-hydroxybenzoic or vanillic acid.Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 337–341, May–June, 1977.     

Glycolipids of the woody verdure ofLarix sibirica

The compositions of the glycolipids of the main fractions of the woody verdure of the Siberian larch — needles and shoots — have been studied. The dynamics of the amounts of individual glycolipids in the course of vegetation have been established. The qualitative and quantitativae compositions of the fatty acids of the total glycolipids of the needles and shoots have been determined.Siberian Technological Institute, 660049, Krasnoyarsk, Prospekt Mira, 82. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 183–187, March–April, 1994.     

Development of a method for the quantitative determination of chamazulene in the essential oil ofArtemisia jacutica

Siberian Medical University, Siberian. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 506–507, May–June, 1995. Original article submitted December 27, 1993.     

Abietic and dehydroabietic acid derivatives from needle-free shoots of shoots ofPinus sylvestris

Methyl ethers of hydroxy and keto derivatives of abietic and dehydroabietic acids — 12-hydroxy- and 12-ketoabietic and 12-hydroxy-, 15-hydroxy-, and 17-ketodehydroabietic acids — have been isolated from an extract of needle-free shoots of the Scotch pine and have been identified in the form of methyl esters.S. M. Kirov Leningrad Academy of Wood Technology. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 345–351, May–June, 1985.     

The mechanism of the formation of quinonic acids in the oxidation of the bark of the Siberian larch. I

Summary 1. It has been established that in the reaction of Siberian larch bark with atmospheric oxygen in nitric acid, the hemicelluloses and the phenolic complex are oxidized most readily.2. The phenolic acids are decomposed almost completely. The considerable yield of oxalic acid shows a degradation of their aromatic nucleus during oxidation.3. In the oxidation of the bark lignin the cleavage of the lignin macromolecule to the final products does not take place directly. During oxidation an intermediate product with a quinoid system of bonds is formed in considerable amounts, and this then undergoes fragmentation as the result of the oxidative-hydrolytic action of the medium.Siberian Technological Institute, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 403–409, May–June, 1977.