Water-soluble linear β-1,6-D-glucan and other components of the lichen Haematomma lapponicum

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 400–401, May–June, 1990.     

Triterpenoids in leaves of Urals and Altai birches and questions of their chemotaxonomy

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Wood Institute, Urals Branch, USSR Academy of Sciences, Sverdlovsk. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 278–279, March–April, 1990.     

Synthesis of methyl 2,6- and 3,6-dideoxy-α-L-arabino-hexopyranosides and methyl 4,6-dideoxy-α-L-lyxo-hexopyranoside

A convenient method of synthesizing methyl 2,6- and 3,6-dideoxy-α-L-arabinohexopyranosides and of methyl 4,6-dideoxy-α-L-lyxo-hexopyranoside is proposed. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 320–322, May–June, 1990.     

General characteristics of immunomodulator bioglycans from invertebrates of the sea of Japan

Bioglycans have been isolated from 23 species of marine invertebrates from the Sea of Japan and a comparative study of them has been made. It has been shown that these bioglycans possess immunomodulating activity and consist of complexes of polysaccharides with a protein component. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 738–742, November–December, 1990.     

Natural antioxidants. Furanoeremophilanes from Cacalia roots

Sesquiterpene compounds of the furanoeremophilane series have been isolated from extracts of the roots ofCacalia sp. growing in the Soviet Far East. The presence of antioxidant and antiradical activities in two representatives of the series has been established. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 643–646, September–October, 1989.     

A new acetylated glycoside from the holothurian Cucumaria japonica

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 590–591, September–October, 1992.     

Phenolic composition ofArtemisia laciniata

V. L. Komarov Botanical Institute, Academy of Sciences of the USSR, Leningrad. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 115–117, January–February, 1990.     

Crystal and molecular structure of hyatoquinone hydrate from a marine sponge Hyatella sp.

The crystal and molecular structures of hyatoquinone hydrate have been established by x-ray structural analysis. The existence of a difference in the spatial orientation of the quinoid fragment in hyatoquinone and in the ilimaquinone studied previously has been shown. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 467–471, July–August, 1991.     

Fatty acids of the soft coral Gersemia rubiformis

Institute of Marine Biology, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 447–448, May–June, 1988.     

Glycosylation of triterpenoids of the dammarane series. VIII. Dammarane hydroxyketone β-D-glycopyranosides

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 307–308. March–April, 1988.     

New triterpene glycosides from the holothurian Cladolabes sp.

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 764–765, September–October, 1988.     

Physiological activity of diterpenoids from the soft coral Sarcophyton trocheliophorum

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. pp. 137–139, January–February, 1988.     

New derivatives of (?)-neocembrene from the soft coral Sarcophyton trocheliophorum

A hexane extract of the soft coralSarcophyton trocheliophorum has yielded two new diterpenoids for which the structures of 13S-hydroxy-(–)-neocembrene and 13S-hydroxy-11,12-epoxy-(–)-neocembrene have been established.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 535–540, July–August, 1988.     

Isolation of preparations with a high content of eicosapentaenoic acid from the red marine alga Palmaria stenogona

The composition is given of the fatty acids of the red marine algaPalmaria stenogona. The amount of eicosapentaenoic acid (EPA) in the alga was 69.9–77.0% of the total fatty acids. The procedure for isolating EPA of 80–90% purity from the alga is described which includes the saponification of the algal lipids, the selective extraction of the unsaponifiable lipids, the isolation of the free fatty acids, and their separation by the method of crystallizing inclusion complexes of the fatty acids with urea. Institute of Marine Biology, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 330–333, May–June, 1990.     

Structure of a new triterpenoid from the bark of the Siberian larch

Sesquiterpene compounds of the furanoeremophilane series have been isolated from extracts of the roots ofCacalia sp. growing in the Soviet Far East. The presence of antioxidant and antiradical activities in two representatives of the series has been established.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 643–646, September–October, 1989.     

Cembrenolides of a soft coral Lobophytum sp. (coelenterata,octocorallia, alcyonacea)

The known cembrenolide sarcophin and its new acetoxy derivative — 13-acetoxy-7,8-epoxycembra-1(15),3,11-trien-2,16-olide — have been isolated from the soft coralLobophytum sp.. The compounds isolated are inhibitors of the activity of Na⁺K⁺-ATPase and are membranotropic agents. The structures of the compounds have been shown on the basis of the results of NMR spectroscopy. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 762–765, November–December, 1990.     

Synthesis of polybrominated diphenyl ethers of marine origin

Polybrominated diphenyl ethers — antimicrobial metabolites of the marine spongeDysidea fragilis — have been obtained by the reaction of 2,3,5-tribromonitrobenzene with 3,5-dibromo-2-methoxyphenol and the reaction of brominated diphenyliodonium salts with brominated phenols. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 352–354, May–June, 1993.     

Synthesis of methyl 2,6-dideoxy-β-D-arabino-, 3,6-dideoxy-β-D-ribo-, and 4,6-dideoxy-β-D-xylo-hexopyranosides

A convenient method is proposed for the synthesis of methyl 1,6-dideoxy-β-D-arabino-, 3,6-dideoxy-β-D-ribo-, and 4,6,dideoxy-β-D-xylo-hexopyranosides by the partial deoxygenation of methyl β-D-quinovopyranoside followed by liquid chromatography of the dideoxysugars. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 741–743, November–December, 1991.     

Structures of four new triterpene glycosides from the holothurian Cucumaria japonica

Four new triterpene glycosides of the holostane series have been isolated from an alcoholic extract of the economically important Pacific Ocean holothurianCucumaria japonica: cucumariosides A₁-2 (I), A₂-3 (II), A₂-4 (III), and A₄-2 (IV). The structures of these substances have been established by the methods of carbohydrate chemistry and¹³C NMR spectroscopy. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 787–793, November–December, 1990.     

Phenolic antioxidants of the bark ofFraxinus mandshurica

Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern. Division of the Russian Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 680–681, September–October, 1994.