Triterpene glycosides ofLeontice eversmannii

Conclusions The structure of leontoside D-a hederagenin pentaoside-has been established. The O-glycosidic moiety of leontoside D is O--D-glucopyranosido-(1 4)-O--L-arabopyranose, and the O-acyl moiety is O--L-rhamnopyranosido-(1 4)-O--D-glucopyranosido-(1 6)-O--D-glucopyranose.Khimiya Prirodnykh Soedinenii, Vol. 4, No. 3, pp. 153–158, 1968     

Proanthocyanidins of Polygonum coriarium. I

Six proanthocyanidins have been isolated from the roots ofPolygonium coriarium. The structures of three oligomeric proanthocyanidins have been established: taranin, consisting of [epigallocatechin gallate]-(48)-[epigallocatechin gallate]-(48)-[epigallocatechin-(48)-epigallocatechin₂-(48)-epigallocatechin; taranoside A - [epigallocatechin gallate]-7-0-[-(16)--D-Glcp]₃-(48)-[epigallocatechin-(48)-epigallocatechin]₂-(48)-gallocatechin; and taranoside B - [epigallocatechin gallate]-7-O-[-(16)--D-Glcp]₄-(48)-[epigallocatechin-(48)-epigallocatechin]₂-(48)-epigallocatechin-(48)-[epigallocatechin gallate).Institute of the Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 59–67, January–February, 1992     

Triterpene Glycosides of Tetrapanax papyriferum. I. Isolation and Structure of Glycosides St-H2 and St-I2 from Stem Bark

Stem bark ofTetrapanax papyriferumC. Koch., Araliaceae, yielded new triterpene glycosides 28-O--L-rhamnopyranosyl-(14)-O-(6-O-acetyl--D-glucopyranosyl)-(16)-O--D-glucopyranosyl esters of the 3-O-[-D-glucopyranosyl-(13)-[-D-galactopyranosyl-(12)]-O--L-arabinopyranosides of oleanolic and echinocystic acids. The structures of these substances were established using chemical and physicochemical methods     

Triterpene glycosides ofHedera taurica. XI. Structures of taurosides St-G1, St-H1, and St-H2 from the stems of Crimean ivy

The previously known glycosides 3-O--L-arabinopyranosyl-28-O-[-L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl]hederagenin and 3-O-[-L-rhamnopyranosyl-(12)-O--L-arabinopyranosyl]-28-O-[-L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl]hederagenin and the new triterpene glycoside tauroside St-H₁ — 3-O--D-glucopyransyl-28-O-[-L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl]hederagenin — have been isolated from the stems ofHedera taurica Carr.M. V. Frunze Simferopol' State University. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 571–579, July–August, 1993.     

Triterpene Glycosides of Tetrapanax papyriferum. II. Isolation and Structure Determination of Glycosides St-E2, St-F2, St-J2, and St-K2 from Stem Bark

Stem bark ofTetrapanaxpapyriferum yielded the new triterpene glycosides 3-O-[-D-glucopyranosyl-(13)]--D-galactopyranosyl-(12)-O--L-arabinopyranosides of oleanolic and echinocystic acids and their 28-O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl esters. Their structures were established using chemical and physicochemical methods     

Triterpene glycosides ofSalsola micranthera. II. The strucutre of salsoloside E

A new triterpene glycoside — salsoloside E — has been isolated from the epigeal part of the plantSalsola micranthera Botsch. family Chenopodiaceae. On the basis of chemical transformations and physicochemical characteristics its structure has been established as oleanolic acid 28-0--D-glucopyranoside 3-0-{[0--D-glucopyranosyl-(1 2)][0--D-xylopyranosyl-(1 4)]--D-glucuronopyranoside}.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 65–69, January–February, 1964.     

Steroid saponins and sapogenins ofAllium IX. The structure of aginoside

Summary From a methanolic extract of the skins of the bulbs ofAllium giganteum Rgl, a new steroid glycoside has been isolated — aginoside, which is (25R)-5-spirostan-2, 3, 6-triol 3-0-{[0--D-xylopyranosyl-(13)-]-[0--D-glucopyranosyl-(12)]-0--D-glucopyranosyl-(14)-0--D-galactopyranoside}.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–486, July–August, 1976.     

Structure of gangliosides from gonads of the starfish Evasterias retifera

Mono- and disialogangliosides were isolated from gonads of the starfish Evasterias retifera. Their structures were elucidated using chemical methods, GC-MS analysis, and enzymatic hydrolysis with neuraminidase. The monosialoganglioside has the structure 8-O-Me-Neu5Gc-23-GalNAc-13-Gal-14-Glc-11-Cer, while the disialoganglioside contains an additional Neu5Ac residue which glycosylates GalNAc in position 6. The lipid moieties of both gangliosides contain phytosphingosine (mainly C_18:0) and two types of fatty acids, unsubstituted (mainly C_16:0 and C_18:0) and -hydroxy acids (mainly -hydroxy-C_16:0).     

The triterpene glycosides ofpatrinia intermedia roem et schult

Conclusions It has been established that patrinoside D₁ is the -D-glucopyranosido(13) -D-xylopyranosido(12) -L-rhamnosido(14)--D-xylopyranoside (13) of oleanolic acidKhimiya Prirodnykh Soedinenii, Vol. 5, No. 2, pp. 84–89, 1969     

Polysaccharides ofUngernia. VII. Partial hydrolysis of the mannan of the bulbs ofU. vvedenskyi

4-O--D-Manopyranosyl-D-mannose, O--D-mannopyranosyl-(l4)-O--D-mannopyranosyl-(14)-D-mannose, and 0--D-mannopyranosyl-(14)-O--D-mannopyranosyl-(l4)-O--D-mannopyranosyl-(l4)-D-mannose have been isolated fron the products of the partial hydrolysis of ungeromannan-V, obtained fron the bulbs ofUngernia vvedneskyi, and have been identified. This set of oligosaccharides confirms the regular structure of the carbohydrate chain of ungeromannan-V, which consists of a linear sequence of -14-bound D-mannose residues.DeceasedTranslated from Khimiya Prirodnykh Soedineii, No. 4, pp. 434–436, July–August, 1981.     

Steroid glycosides of the leaves of Yucca aloifolia

Two new steroid glycosides have been isolated from the leaves of aloe yucca and their structures have been established. Glycosides B and C are tigogenin penta-and hexaosides. Glycoside B, which we have called yuccaloeside B is (25R)-5-spirostan-3-ol 3-{[O--D-glucopyranosyl-(12)]-[O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(13)]-O--D-glucopyranosyl-(14)--D-galactopyranoside}, and glycoside C, which we have called yuccaloeside C is (25R)-5-spirostan-3-ol 3-{[(O--D-glucopyranosyl-(13)-O--D-glucopyranosyl-(12)]-[O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(13)]-O--D-glucopyranosyl-(14)--D-galactopyranoside}.N. G. Kutateladze Institute of Pharmacochemistry of the Georgian SSR Academy of Sciences, Tbilisi. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 537–542, July–August, 1987.     

Triterpene glycosides ofHedera helix II. Determination of the structure of glycoside L-6d from common ivy leaves

A new hederagenin pentaoside — glycoside L-6d — has been isolated from the leaves of common ivyHedera helix L., fam. Araliaceae, and its structure has been determined by using various NMR-spectroscopic methods. Glycoside L-6d is hederagenin 3-O-[O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl-(14)-O--L-rhamnopyranosyl-(12)--L-arabinopyranoside.Simferopol' State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 746–752, November–December, 1994.     

Triterpene glycosides ofHedera helix I. The structures of glycosides L-1, L-2a, L-2b, L-3, L-4a, L-4b, L-6a, L-6b, L-6c, L-7a, and L7-b from the leaves of common ivy

The leaves of common ivy have yielded 11 triterpene glycosides: the 3-O--L-pyranosides of oleanolic acid (1), of echinocystic acid (2), and of hederagenin; the 3-O-[O--L-rhamnopyranosyl-(12)--L-arabinopyranoside]s of oleanolic acid (4), of echinocystic acid (5), and of hederagenin (6); the O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl ester of hederagenin 3-O--L-pyranoside (7); the O--D-glucopyranosyl-(16)-O--D-glucopyranosyl ester of hederagenin 3-O-[O--L-pyranosyl-(12)--L-arabinopyranoside] (9); and the O--L-rhamnopyranosyl-(14)-O--D-glucopyranosyl-(16)-O--D-glucopyranosyl esters of oleanolic acid, echinocystic acid, and hederagenin 3-O-[O--L-rhamnopyranosyl-(12)--D-glucopyranoside]s (8), (10), and (11), respectively. This is the first time that compounds (1), (2), (5), (7), (9), and (10) have been found in this plant.Simferopol' State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 742–746, November–December, 1994.     

Synthesis of 3, 6-anhydrocellulose by the saponification of 6-O-tosyl-2, 3-di-O-acetylcellulose

Summary 1. Derivatives of cellulose containing 3, 6-anhydro rings have been synthesized by the following route: cellulose 6-O-tritylcellulose 6-O-trityl-2, 3-di-O-acetylcellulose 2, 3-di-O-acetylcellulose 6-O-tosyl-2, 3-di-O-acetylcellulose 3, 6-anhydrocellulose.2. The composition of the 3, 6-anhydrocellulose has been studied by exhaustive acetylation, nitration, and periodate oxidation, and also by IR spectroscopy.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 6, pp. 372–375, 1966     

Kinetics of ion exchange sorption of phosphate

The kinetics of phosphate sorption on Amberlite IRA-400 has been studied as a function of temperature, nature of counterions, at two different concentrations. The film and particle diffusion coefficients and the activation parameters of the process are calculated.

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IRA-400 , . .

     

Triterpene glycosides ofSophora japonica seeds

We have isolated from the seeds of Sophora japonica the known soyasaponogenol B-3-[O--D-glucopyranosyl-(12)-O--D-glucopyranuronoside] (adzukisaponin II), soyasapogenol B [3-O--galactopyranosyl-(12)-O--L-glucopyranuronoside] (soyasaponin III), soyasapogenol B 3-(O--L-rhamnopyranosyl-(12)-O--L-glucopyranosyl-(12)-O--D-glucopyranuronoside] (adzukisaponin V), soyasapogenol B 3-(O--D-rhamnopyranosyl-(12)-O--D-galactopyranosyl-(12)-O--D-glucopyranuronoside] (soyasaponin I), and the new glycoside (1) — soyasapogenol B 3-[O--D-glucopyranuronoside]. The structure of this glycoside has been established on the basis of the results of enzymatic, complete, and partial hydrolyses and¹³C NMR spectra.Simferopol' State University and Kursk State Medical Institute, Kursk. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 709–713, September–October, 1995. Original submitted March 3, 1995.     

Triterpene glycosides of Hedera taurica

From the leaves of Crimean ivy we have isolated the previously known glycosides 3-O--L-Ara_p-28-O-[O--L-Rha_p-(14)-O--D-Glc_p-(16)--D-Glc_p]hederagenin, 3-O-[O--L-Rha_p-(12)--L-Ara_p]-28-O-[O--L-Rha_p-(14)-O--D-Glc_p-(16)--D-Glc_p]oleanic acid and -hederagenin, and 3-O-[O--L-Rha_p-(12)--L-Ara_p]-28-O-[O--D-Glc_p-(16)--D-Glc_p]hederagenin and a new one: tauroside H₁ — 3-O-[O--L-Rha_p-(12)-O--L-Ara_p]-28-O-[O--L-Rha_p-(14)-O--D-Glc_p-(16)--D-Glc_p]echinocystic acid.M. V. Frunze Simferopol' State University. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 522–528, September–October, 1992.     

Steroid saponins and sapogenins ofAllium. XVI. Turoside C fromAllium turcomanicum

From a methanolic extract of the bulbs ofAllium turcomanicum Rgl. we have isolated a new furostanol glycoside, turoside C (I). An acid hydrolysate was found to contain the aglycone — neoagigenin (II) — and the sugars D-xylose, D-glucose, and D-galactose in a ratio of 1:4:1. The structure of the furostanol (I) has been established by methylation, enzymatic hydrolysis, and oxidative cleavage, and also by the oxidative cleavage of (II), as (25S)-5-furostan-2,3,6,22,26-pentaol 26-O--D-glucopyranoside 3-O-{[O--D-xylopyranosyl-(13)]-[O--D-glucopyranosyl-(12)-O--D-glucopyranosyl-(12)]-O--D-glucopyranosyl-(14)--D-galacto-pyranoside}.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 514–522, July–August, 1979.     

Triterpene glycosides from Pulsatilla chinensis

Four triterpene glycosides were isolated from the roots of Pulsatilla chinensis (Bunge) Regel (Ranunculaceae). Two new glycosides, chinensiosides A (1a) and B (2), were identified as 3-O-[-L-rhamnopyranosyl-(12)--L-arabinopyranosyl]-28-O-[-L-rhamnopyranosyl-(14)--D-glucopyranosyl-(16)--D-glucopyranosyl]-3,23-dihydroxylup-20(29)-en-28-oic acid and 3-O-{-L-rhamnopyranosyl-(12)-[-D-glucopyranosyl-(14)]--L-arabinopyranosyl}-28-O-[-L-rhamnopyranosyl-(14)--D-glucopyranosyl-(16)--D-glucopyranosyl]-3,23-dihydroxylup-20(29)-en-28-oic acid. The other two glycosides were identified as previously known hederasaponin C (3) from Hedera helix and glycoside III (4) from Pulsatilla cernua.