O-acylated flavonoid glycoside of the needles ofPicea obovata

Summary From the needles of the Siberian spruce we have isolated a new diacylated flavonoid glycoside (I) for which we have established the structure of 3-(3-O-p-coumaroyl-6-O-feruloyl-glucopyranosyloxy)-4,5,7-trihydroxyflavone.The new acylated glucoside 6-O-feruloylastragalin (III) has been obtained and characterized for the first time.All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. M. M. Sechenov First Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedirenii, No. 5, pp. 570–576, September–October, 1978.     

O-acylated flavonoid glycosides from the needles ofPicea obovata II. 3′- and 6′-isomers of p-coumaroylastragalin

Two monoacylated glycosides have been isolated from the needles ofPicea obovata — the previously unknown 3-p-coumaroylastragalin (I) and 6-p-coumaroylastragalin (II). It has been established that under the conditions of mild saponification and acid hydrolysis isomerization of (I) into (II) and the splitting out of the acy1 residue takes place. The position of the acy1 substituent has been shown by PMR spectroscopy using the INDOR method. The physicochemical characteristics of the acylated glycosides and of their heptaacetates are given.All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Irkutsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, Moscow. I. M. Sechenov First Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 186–190, March–April, 1980.     

O-acylated flavonoid glycosides of the needles ofPinus sylvestris III. Di-p-coumaroyltrifolin

Summary A new diacylated flavonol glycoside has been isolated for the first time from Scotch pine needles, and for it the structure of 3,4,5,7-tetrahydroxyflavone 3-0-(3,6-di-O-p-coumaroyl--D-galactopyranoside) has been established.In the course of the chemical study of the compound isolated, the previously undescribed 6-O-p-coumaroyltrifolin was isolated and characterized.All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. I. M. Sechenov First Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 332–336, May–June, 1978.     

O-acylated flavonoid glycosides of the needles ofPinus sylvestris II. 3“-O-p-coumaroylisoquercitrin

Summary A new acylated flavonoid glycoside has been isolated from Scotch pine needles and the structure of 3,4,5,7-tetrahydroxyflavone 3-O--D-(3-O-p-coumaroylglucopyranoside) has been established for it.Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. All-Union Scientific-Research Institute of Medicinal Plants, Moscow. I. M. Sechenov I Moscow Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 196–200, March–April, 1978.     

O-acylated flavonoid glycosides of the needles ofPinus sylvestris I. O-acetylated derivatives of flavonol glycosides

Summary O-Acetylated flavonol glycosides have been isolated for the first time from the needles of the Scotch pine and the following structures have been established for them: 3,45,7-tetrahydroxy-3-methoxyflavone 3-O--D-(6-O-acetylglucopyranoside), 3,4,5,7-tetrahydroxy-3-methoxyflavone 3-O--D-(6-O-acetylgalactopyranoside), and 3,3,4,5,7-pentahydroxyflavone 3-O--D-(6-O-acetylglucopyranoside). The first two compounds have not previously been described in the literature.All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. I. M. Sechenov I Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 193–196, March–April, 1978.     

A new flavonoid glycoside from Elsholtzia bodinieri

A new flavonoid glycoside, eriodictyol 7-O-(6″-caffeoyl)-β-D-glucopyranoside (1), along with 14 known compounds, were isolated from the whole plants of Elsholtzia bodinieri. All of the structures were determined by spectroscopic methods and chemical transformation. Compound 1 and luteolin (9) exhibited potent anti-HCV activities with a selective index of 135.85 and 20.84, respectively.     

A new flavonoid glycoside from Vaccaria hispanica

A profiling analysis for the methanol extract of the seeds of Vaccaria hispanica (Mill.) Rauschert was performed using a HPLC-ESI-MS technique. Five compounds were identified according to their retention times, UV spectroscopic and MS features, and by comparison with literature data. Among them, a new flavonoid glycoside, named vaccarin H, was isolated and the structure determined by spectral and chemical analysis as isovitexin 2"-O-alpha-L-arabinopyranosyl-4'-O-(6"-O-dihydroferuloyl)-3-beta-glucopyranoside.     

A flavonoid glycoside and hydrocarbons and sterols from Thalictrum simplex

Irkutsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 723–724, November–December, 1992.