نتایج جستجو برای: α amyrin
تعداد نتایج: 165153 فیلتر نتایج به سال:
The first committed step in triterpenoid biosynthesis is the cyclization of epoxysqualene into various triterpene alcohol isomers, a reaction catalyzed by oxidosqualene cyclases (OSCs). The different OSCs have characteristic product specificities, which are mainly due to differences in the numbers of high-energy intermediates the enzymes can stabilize. The goal of this investigation was to clon...
the patients often seek medical care. Ascending pathways in the spinal cord that relay nociceptive information from the periphery to supraspinal central nervous system sites has been studied as potential targets for disrupting pain processing and providing relief. Despite the considerable advances in knowledge regarding the basic mechanisms underlying visceral pain and visceral hyperalgesia, no...
In this report, the extracts from fruit and leaves of Couroupita guianensis were isolated using chromatographic methods investigated for chemical composition. Four triterpenoid compounds identified as betulinic acid, oleanolic β-amyrin friedelin. Their structures interpreted based on modern spectra such MS, NMR compared with previously published spectral data.
A novel β-lactam derivative, albactam, was isolated from the alcoholic extract of the flowers of Albizia lebbeck. It showed a significant anti-aggregatory activity against adenosine diphosphate and arachidonic acid induced guinea-pigs' platelets aggregation in vitro. Six more known compounds were also isolated and fully characterized by measuring 1D and 2D NMR, two of them are the triterpenes β...
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