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Roots of Tragacantha stipulosa Boriss yielded three triterpene glycosides of the cycloartane series: askendoside G (1), askendoside D (2), and cycloglobiceposide B (3). Glycoside 1 is 3-O- α -L-arabinopyranosyl-(1→2)- β -D-xylopyranoside; 16-O- β -D-glucopyranoside-24R-cycloartan-3 β ,6 α...
The partial synthesis of cyclopycanthogenin, 20R,24S-epoxycycloartan-6 α ,16 β ,25-triol-3-one, was developed in four steps from cyclosiversigenin.
Reactions of the natural terpene camphene with various reagents on zeolitic catalysts are reviewed.
Two alkaloids were isolated from the aerial part of Nitraria sibirca . Their structures were determined using chemical transformations and spectral data.
The physicochemical and functional properties of the venom, hemolymph, and egg extract of the karakurt spider Latrodectus tredecimguttatus were studied. A highly purified toxin that differs from the neurotoxins found previously in the venom was isolated from the hemolymph and characterized.
Proteins of camel's milk and shubat were studied by electrophoresis. Their microelement compositions were determined. Electrophoresis showed two bands in camel's milk and several in shubat. It was found that Fe and Zn occur in greater quantities in both camel's milk and shubat than in cow's milk.
The reaction of barbituric acid and its N-substituted derivatives and 2-thio analogs with cotarnine forms 5-(4-methoxy-6-methyl-5,6,7,8-tetrahydro-2H-1,3-methylenedioxy-(4,5-g)isoquinolinyl-1)barbituric acids, a new class of zwitter-ions, the structure of which was studied by 1 H and 13 C NMR...
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