Results 31 to 40 of about 25,253 (95)

Phytochemical Screening and Antibacterial Activity of Leaves Extract Balangla (Litsea cubeba (Lour) Pers.) from Malinau, East Borneo [PDF]

open access: yes, 2015
Balangla (Litsea cubeba) plant is used as traditional medicine by Dayak Kenyah tribe in East Kalimantan. It contains active compounds that are efficient to treat many human diseases and believed to have an antibacterial activity. The purposes of
Manurung, Hetty   +2 more
core   +1 more source

Columbamine, the central intermediate in the late stages of protoberberine biosynthesis [PDF]

open access: yes, 1986
A specific methyltransferase which in the presence of S-adenosylmethionine [SAM] converts columbamine to palmatine has been demonstrated to occur in cell cultures.
Rüffer, Martina, Zenk, Meinhart H.
core   +1 more source

Synthesis and structure - Activity relationship study of potent cytotoxic analogues of the marine alkaloid Lamellarin D [PDF]

open access: yes, 2014
The marine alkaloid, Lamellarin D (Lam-D), has shown potent cytotoxicity in numerous cancer cell lines, and was recently identified as a potent topoisomerase I inhibitor.
Albericio Palomera, Fernando   +6 more
core   +2 more sources

Influence of Quaternary Benzophenantridine and Protopine Alkaloids on Growth Performance, Dietary Energy, Carcass Traits, Visceral Mass, and Rumen Health in Finishing Ewes under Conditions of Severe Temperature-humidity Index. [PDF]

open access: yes, 2015
Twenty Pelibuey×Katahdin ewes (35±2.3 kg) were used to determine the effects of the consumption of standardized plant extract containing a mixture of quaternary benzophenanthridine alkaloids and protopine alkaloids (QBA+PA) on growth performance, dietary
Aguilar-Hernández, A   +9 more
core   +2 more sources

Biosynthesis of the protoberberine alkaloid jatrorrhizine [PDF]

open access: yes, 1983
Feeding experiments with distant single or doubly labelled precursors show that the methylene dioxy group of berberine is opened in the formation of ...
Beecher   +8 more
core   +1 more source

Regioselective reactions of 3,4-pyridynes enabled by the aryne distortion model. [PDF]

open access: yes, 2013
The pyridine heterocycle continues to play a vital role in the development of human medicines. More than 100 currently marketed drugs contain this privileged unit, which remains highly sought after synthetically. We report an efficient means to access di-
Garg, Neil K, Goetz, Adam E
core  

Stereochemical studies on protonated bridgehead amines. ^1H NMR determination of cis and trans B-C ring-fused structures for salts of hexahydropyrrolo [2,1-a] isoquinolines and related C ring homologs. Capture of unstable ring-fused structures in the solid state [PDF]

open access: yes, 1989
Acid-addition salts of tricyclic isoquinolines 2a/b, 3a/b, 4a-4c, 5, 6a/b, 7, 8a/b, 9a/b, and 17a/b were studied by high-field ^1H NMR in CDCl_3 solution.
Inners, Ruth R.   +6 more
core  

Hepatotoxicity induced by greater celandine (Chelidonium majus L.): a review of the literature [PDF]

open access: yes, 2017
The available literature assessing Chelidonium majus L. (CM) hepatotoxicity potential, and its risk to benefit assessment has been reviewed in this paper.
Busardò, F. P   +6 more
core  

Reaction of Group III Biheterocyclic Complexes [PDF]

open access: yes, 2009
Group III alkyl complexes supported by a ferrocene diamide ligand (1,1′-fc(NSitBuMe_2)_2) have been found to be reactive toward aromatic N-heterocycles such as 1-methylimidazole and pyridines.
Benitez, Diego   +6 more
core   +1 more source

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