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1984, Journal of Natural Products
Biochemical Systematics and Ecology
A new bisbenzyltetrahydroisoquinoline alkaloid from Berberis tabiensis (Berberidaceae2015 •
Boletin Latinoamericano y del Caribe de Plantas Medicinales y Aromaticas
Identification of isoquinoline alkaloids from Berberis microphylla by HPLC ESI-MS/MSAbstract: Berberis microphylla (G. Forst) is a native plant growing in Patagonia. In recent years Patagonia Berberis are becoming important due to their interesting biological properties related to their alkaloids content. The aim of this study was determine the distribution and proportion of isoquinoline alkaloids in leaves, stems and roots of B. microphylla collected in two different climatic zones from Chilean Patagonia. Using by HPLC ESI-MS/MS isocorydine, jatrorrhizine, palmatine, reticuline, scoulerine, tetrahydroberberine and thalifendine were detected for the first time in this specie, and the presence of allocryptopine, berberine, calafatine and protopine, previously isolated in B. microphylla was corroborated. The alkaloids profile showed differences of compounds in samples collected in two climatic zones, where more compounds were detected in plants from Lago Deseado than Cerro Sombrero. Furthermore, a greater number of alkaloids were found in stem and root extracts and b...
1988 •
Two major bisbenzylisoquinoline alkaloids, isotetrandrine and berbamine and three protoberberine type alkaloids berberine, palmatine, and jatror-rhizine were isolated from seeds of Berberis thunbergii DC. Berberine and oxyberberine, which is not present in the seeds, were isolated from the pericarp. Identity of the isolated substances was verified by spectral means (i.r., u.V., and mass spectrometry), optical rotation, and comparison with specimens.
Natural Product Communications
(+)-Chenabinol (Revised NMR Data) and Two New Alkaloids from Berberis vulgaris and their Biological Activity2015 •
A known alkaloid (+)-chenabinol (1) and two new secobisbenzylisoquinoline alkaloids were isolated by standard chromatographic methods from the root bark of Berberis vulgaris L. The structures of the new alkaloids, named berkristine (2) and verfilline (3), were established by spectroscopic (including 2D NMR), and HRMS (ESI) methods. The alkaloids were tested for their inhibition activity of human cholinesterases and prolyl oligopeptidase. Compound 1 inhibited human butyrylcholinesterase with an IC50 value of 44.8 ± 5.4 μM.
ARJ – Art Research Journal / Revista de Pesquisa em Artes
A julgar pela imagem: estado autoritário e a caça às alteridades2019 •
Physical Oceanography
Factors of formation and features of physical and chemical characteristics of the bottom sediments in the Balaklava Bay (the Black Sea)2015 •
1984 •
2021 •
2012 •
Brazilian Dental Science
Stress distribution and failure load of multilayer and monolayer glass ceramic2019 •
Canadian Journal of Infectious Diseases and Medical Microbiology
Development of New Tools to Detect Colistin-Resistance among Enterobacteriaceae Strains2018 •
Revista Iberoamericana de Ciencias
Aprendizaje colaborativo mediado por TIC2021 •
South Central Review
Rediscovering Forgotten Radicals: British Women Writers, 1889-19391994 •
2021 •