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A series of 1,3,4-trisubstituted pyrazole derivatives (3 a-f), (4 a-f), and (5 a-f) have been synthesized and evaluated for their cyclooxygenase (COX-1 and COX-2) inhibitory activity. The structures of newly synthesized compounds were characterized by IR, 1H NMR, and mass spectral analysis. All of the compounds showed good inhibition of COX-2 with IC50 of(More)
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