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The relationship between chemical structure and hemolytic and cytotoxic activity was studied for dammarane-type triterpenoids isolated from leaves of various Betula species. It was shown that an acyclic sidechain (betulafolienetriol and betulafolienetetraol) imparted significantly higher...
Low-and high-resolution mass spectra and spectra of metastable ions were studied using direct analysis of daughter ions (DADI) and metastable defocusing (MD) of lagochiline-type diterpenoids. Patterns in their fragmentation were found.
The chemical composition and antimicrobial activity of the essential oil from aerial parts of Anthemis wiedemanniana , an endemic taxon of Turkey, were investigated. Linalool (12.75%), 1,8-cineole (8.49%), hexadecanoic acid (6.09%), and chrysanthenone (5.67%) were found to be the main components...
The chemical composition of Pinus silvestris essential oil from contaminated areas was studied. An apparent effect of radionuclides and toxic elements on the biosynthesis of terpenoids in common pine essential oil was found. Increasing contamination apparently increased the content of...
Optically active camphordihydro-2,3-pyrazine and camphorquinoxaline were prepared from camphoroquinone enantiomers. It was shown that (1 S ,4 R )-(+)-camphoroquinone was formed by oxidation of (1 S ,3 R , 4 R )-(−)-3-bromocamphor and (1 R ,4 S )-(−)-camphoroquinone from (1 R ,3 S , 4 S...
In this paper a novel method for extraction and separation of total flavones and total astragalosides from Radix astragali using a resin method is suggested. Ethanol is used as the extractant, the macroporous absorption resin modeled H-107 is used to enrich the astragalus extract, and the...
5 α -Androstan-3 β ,17 β -diol (3b-adiol), a known inhibitor of prostate cancer cell growth, was synthesized from tigogenin. Its structure was confirmed by NMR and IR spectroscopy and mass spectroscopy.
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