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https://www.selleckchem.com/JAK.html 063-0.25 mg ml-1 and APC14 at 0.003-0.5 mg ml-1. These results show that combination therapy can negate induced drug resistance in L. mexicana and that the use of this type of screening system could accelerate the development of drug combinations for clinical use.A series of compounds have been synthesized with a variety of substituents based on a three-carbon chain at the C9-position of 3-hydroxy-N-phenethyl-5-phenylmorphan (3-(2-phenethyl-2-azabicyclo[3.3.1]nonan-5-yl)phenol). Three of these were found to be μ-opioid receptor agonists in the inhibition of forskolin-induced cAMP accumulation assay and they did not recruit β-arrestin at all in the PathHunter assay and in the Tango assay. Compound 12 (3-((1S,5R,9R)-2-phenethyl-9-propyl-2-azabicyclo[3.3.1]nonan-5-yl)phenol), 13 (3-((1S,5R,9R)-9-((E)-3-hydroxyprop-1-en-1-yl)-2-phenethyl-2-azabicyclo[3.3.1]nonan-5-yl)phenol), and 15a (3-((1S,5R,9R)-9-(2-hydroxypropyl)-2-phenethyl-2-azabicyclo[3.3.1]nonan-5-yl)phenol) were partial μ-agonists. Two of them had moderate efficacies (EMAXca. 65%) and one had lower efficacy, and they were ca. 5, 3, and 4 times more potent, respectively, than morphine in vitro. Computer simulations were carried out to provide a molecular basis for the high bias ratios of the C9-substituted 5-phenylmorphans toward G-protein activation.Based on crystal structures of Trypanosoma brucei methionyl-tRNA synthetase (TbMetRS) bound to inhibitors, we designed, synthesized, and evaluated two series of novel TbMetRS inhibitors targeting this parasite enzyme. One series has a 1,3-dihydro-imidazol-2-one containing linker, the other has a rigid fused aromatic ring in the linker. For both series of compounds, potent inhibition of parasite growth was achieved with EC50 20 000 nM. Selectivity over human mitochondrial methionyl tRNA synthetase was also evaluated, using a cell-based mitochondrial protein synthesis assay, and selectivity in a range of 20-200-fold was achieved.

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