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https://www.selleckchem.com/products/aminoguanidine-hydrochloride.html It enhances GABA-induced currents, shifting the GABA concentration-response curve to lower concentrations. Photolabeling-protection studies show that it has negligible affinity for the etomidate sites and high affinity for only one of the two R-mTFD-MPAB sites. Exploratory site-directed mutagenesis studies confirm the latter conclusions and hint that pTFD-di-iPr-BnOH may bind between the α+/β- and α+/γ- subunits in the TMD, making it an α+ ligand. The latter α+/γ- site has not previously been implicated in ligand binding. Thus, pTFD-di-iPr-BnOH is a promising new photolabel that may open up a new pharmacology for synaptic GABAARs. Novel anti-proliferative agents possessing pyrimidine scaffolds were designed, synthesized and evaluated for their IC50 values using MTT assay. Most compounds displayed good to excellent activity against the two tested breast cancer lines (MCF-7 and MDA-MB-231) as compared to 5-FU. The observed IC50 values for active compounds ranged from 0.27 to 10.57 µM in MCF-7 compared to the reference drug 5-FU (IC50 = 10.80 µM) and from 0.73 to 29.07 µM in MDA-MB-231 (IC50 for 5-FU = 11.40 µM). SAR analysis indicated that compounds 2c, 3b with hydrazone functionalities and compound 12 possessing pyrazolone ring exhibited superior activities. The most promising compounds were evaluated for their inhibitory activity against epidermal growth factor receptor (EGFR) and aromatase (ARO) enzymes and were further tested for caspase-9 activation, apoptosis and Annexin V/PI staining. Results of enzyme-based experiments indicated that the tested compounds 2c and 12 exert their activities through EGFR inhibition while compound 3b exhibited remarkable ARO inhibition activity. Furthermore, they remarkably induce caspase-9 activation and showed pre G1 apoptosis and cell cycle arrest at G2/M phase. In addition, docked compounds displayed good binding affinities to the target enzymes. Binding inte

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