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- W2039507369 abstract "4-[(1,2-Dihydro-2-oxo-3H-indol-3-ylidene)amino]- N-(4,6-dimethyl-2-pyrimidinyl)-benzenesulphonamide (SPIII-5H) and related compounds were tested for antiviral activity against influenza A (H1N1, H3N2, and H5N1) and B viruses in Madin Darby canine kidney (MDCK) cell culture. Among the compounds tested, SPIII-5H and four derivatives (5-chloro [SPIII-5Cl], 5-bromo [SPIII-5Br], 5-methyl [SPIII-5Me] and N-acetyl [SPIII-NA]) showed similar antiviral potencies, with only the 5-fluoro (SPIII-5F) derivative being ineffective. Fifty percent effective concentration (EC 50 ) values were determined in cytopathic effect (CPE) inhibition assays quantified by neutral red dye uptake. By this method, the active compounds were inhibitory to the H1N1 strain of influenza A at 2.7–5.2 µg/ml, to the H3N2 strain of influenza A at 13.8–26.0 µg/ml, to the H5N1 strain of influenza A at 3.1–6.3 µg/ml and to influenza B at 7.7–11.5 µg/ml. Confirmatory virus yield reduction studies against influenza A (H1N1) virus demonstrated antiviral activity (90% inhibition) at concentrations of 2–10 µg/ml. No cytotoxic effects were evident in actively growing uninfected cells or stationary monolayers at 100 µg/ml. Potencies of the compounds were similar to those of ribavirin, but much less than those of oseltamivir carboxylate against the various viruses. Time-of-addition studies indicated the compounds inhibited an early step in the virus replication cycle, probably virus adsorption/penetration, and no virucidal activity was evident. The basic molecule is amenable to diverse chemical modifications, which may improve water solubility and antiviral potency." @default.
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- W2039507369 date "2006-10-01" @default.
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- W2039507369 title "Anti-Influenza Virus Activities of 4-[(1,2-dihydro-2-oxo-3H-indol-3-ylidene)amino]-N-(4,6-dimethyl-2-pyrimidin-2-yl)benzenesulphonamide and its Derivatives" @default.
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- W2039507369 doi "https://doi.org/10.1177/095632020601700504" @default.
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