نتایج جستجو برای: glycosides
تعداد نتایج: 9088 فیلتر نتایج به سال:
Tacca chantrieri ANDRÉ is a perennial plant belonging to the family Taccaceae and is indigenous to southeast region of the People’s Republic of China. A decoction prepared from the rhizomes of T. chantrieri has long been used in traditional Chinese medicine for the treatment of gastric ulcer, enteritis, and hepatitis. Our previous chemical studies on the rhizomes of T. chantrieri led to the iso...
1. Like other checkerspots, Euphydryas gillettii butterflies may contain the defensive chemicals, iridoid glycosides, which are sequestered from their hostplants during larval feeding. 2. We analysed the iridoid glycoside content of E.gillettii adults from two different populations, Warm Lake, Idaho, and Granite Creek, Wyoming, that have different patterns of hostplant use. 3. Gas chromatograph...
Biotransformations of capsaicinoids such as capsaicin and 8-nordihydrocapsaicin and phenylpropanoids such as cinnamic acid, p-coumaric acid, caffeic acid, and ferulic acid have been investigated using cultured plant cells. Capsain and 8-nordihydrocapsaicin were converted into the corresponding glycosides which are three glycosides respectively using the cultured cells of Catharanthus roseus. In...
The optimal conditions for the binding of cardiac glycosides, such as ouabain, to Na+, K+-ATPase in vitro are the simultaneous presence of ATP, Na+ and Mg++ or the presence of inorganic phosphate (Pi) and Mg++ (Reference 1). It has been postulated that in vitro binding of ouabain in the presence of ATP, Na+ and Mg++ reflects the binding of cardiac glycosides t o this enzyme system in intact ani...
Four new trisulfated triterpene glycosides, fallaxosides D₄ (1), D₅ (2), D₆ (3) and D₇ (4) have been isolated from the sea cucumber Cucumaria fallax (Cucumariidae, Dendrochirotida). The structures of the glycosides have been elucidated by 2D NMR spectroscopy and HRESIMS. All the glycosides have the lanostane aglycones of a rare non-holostane type with 7(8)-, 8(9)- or 9(11)-double bonds, one or ...
Cationic lipids have long been known to serve as antibacterial and antifungal agents. Prior efforts with attachment of cationic lipids to carbohydrate-based surfaces have suggested the possibility that carbohydrate-attached cationic lipids might serve as antibacterial and antifungal pharmaceutical agents. Toward the understanding of this possibility, we have synthesized several series of cation...
Glycosylations of 5-(1H-indol-2-yl)-1,3,4-oxadiazoline-2(3H)-thione delivered various degrees of S- and/or N-glycosides depending on the reaction conditions. S-Glycosides were obtained regiospecifically by grinding oxadiazolinethiones with acylated α-D-glycosyl halides in basic alumina, whereas 3-N-(glycosyl)oxadiazolinethiones were selectively obtained by reaction with HgCl(2) followed by heat...
Plants as such are useful, of which the flowering species contributes one tenth part in finding new drug or the lead molecules. Crossandra infundibuliformis L Nees (Acanthaceae) is a tropical evergreen shrub reported to have some medicinal properties as wound healing, antioxidant, antimicrobial, antiulcer and antisolar activity. Phytoconstitutents of the flower extract is also screened and disp...
Oleanolic acid and its glycosides are important natural products, possessing various attractive biological activities such as antitumor, antivirus and anti-inflammatory properties. In the present work, fifteen oleanolic acid saponins bearing various saccharide moieties, including 3-monoglycoside, 28-monoglycoside and 3,28-diglycoside, were easily synthesized in high yields. Benzyl was chosen as...
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