Methyl 4-broMo-3-fluorothiophene-2-carboxylate

Methyl 4-bromo-3-fluoro-2-thiophenecarboxylate

4-Bromo-3-fluoro-2-thiophenecarboxylic acid methyl ester

2-Thiophenecarboxylic acid, 4-bromo-3-fluoro-, methyl ester