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Room temperature phosphorescence quenching study of coumarins. Indirect determination of warfarin in pharmaceuticals
(Royal Society of Chemistry, 2014-03)
Room temperature phosphorescence of the 1-bromonaphthalene/b-cyclodextrin/cyclohexane inclusioncomplex was studied in the presence of coumarins: warfarin, coumarin, dicumarol and umbelliferone.The differences encountered ...
New coumarins from Pterocaulon polystachyum
(Georg Thieme Verlag Kg, 2001-01)
Aerial parts of Pterocaulon polystachyum from Chaco province, Argentina, afforded the known coumarins ayapin, isoscopoletin, prenyletin, prenyletin methyl ether, virgatenol, obtusinin, 5-methoxy-6,7-methylenedioxycoumarin, ...
Validation of a GC-MS method for the simultaneous determination of five coumarins derivatives in natural soil samples
(Facultad Experimental de Ciencias de la Universidad del Zulia, 2016)
Comparison of seven structurally related coumarins on the inhibition of Quorum sensing of Pseudomonas aeruginosa and Chromobacterium violaceum
(Academic Press Inc Elsevier Science, 2017-08-31)
Quorum sensing (QS) is a cell-to-cell signaling communication system that controls the virulence behavior of a broad spectrum of bacterial pathogens, participating also in the development of biofilms, responsible of the ...
Coumarins as potential inhibitors of DNA polymerases and reverse transcriptases. searching new antiretroviral and antitumoral drugs
(Bentham Science Publishers B.V., 2015-08)
Human Immunodeficiency Virus (HIV) is the viral agent of Acquired Immunodeficiency Syndrome (AIDS), and at present, there is no effective vaccine against HIV. Reverse Transcriptase (RT) is an essential enzyme for retroviral ...
Cytotoxic and Antitumor Activity of some Coumarin Derivatives
(SAGE Publications, 2016-09)
Several natural and synthetic coumarins were assayed against different cancer cell lines. Four of them have shown cytotoxicity against a panel of three human solid tumor cell lines (HeLa, T-47D, and WiDr) and a clearly ...
Chemistry and Biological Activity of Coumarins at Molecular Level
(Natural Products, 2014-08)
Synthetic coumarins were prepared using ionic liquids as an environmental friendly alternative with high yields. The compounds 3,4-dimethyl-7-hydroxycoumarin (3ab) and 3-isopropyl-4-methyl-5,7-dihydroxycoumarin (3bc) have ...
Coumarins and a kaurane from Gochnatia polymorpha ssp. polymorpha from Paraguay
(Pergamon-Elsevier Science Ltd, 2003-02)
Tailor-made and chemically designed synthesis of coumarin-containing benzoxazines and their reactivity study toward their thermosets
(John Wiley & Sons Inc, 2016-05)
Coumarins are used as a natural renewable resource to synthesize coumarin-containing benzoxazine resins. The coumarin-containing benzoxazines are fully characterized in terms of their chemical structure by Fourier-transform ...
Comparisons of the spectroscopic and microbiological activities among coumarin-3-carboxylate, o-phenanthroline and zinc(II) complexes
(Elsevier Science, 2018-06-05)
Coumarins (2H-chromen-2-one) are oxygen-containing heterocyclic compounds that belong to the benzopyranones family. In this work we have synthesized different coordination complexes with coumarin-3-carboxylic acid (HCCA), ...