1H-pyrazole-3-carboxylic acid, 4-bromo-, ethyl ester InChI=1/C6H7BrN2O2/c1-2-11-6(10)5-4(7)3-8-9-5/h3H,2H2,1H3,(H,8,9 ethyl 4-bromo-1H-pyrazole-3-carboxylate