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4-bromo-1,3-dimethyl-1H-pyrazole-5-carboxylic acid ethyl ester; CAS No.: 50920-64-4; 4-Bromo-1,3-dimethylpyrazole-5-carboxylate exemplifies our halogenated azole esters for agrochemical intermediate synthesis. The bromine at C4 and ester at C5 allow sequential cross-coupling and hydrolysis. Operating through chemical online mall platforms, we supply these regioselectively substituted pyrazoles for fungicide lead optimization.