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ethyl 4-fluorobenzo[b]thiophene-2-carboxylate; CAS No.: 1263280-02-9; Ethyl 4-fluorobenzo[b]thiophene-2-carboxylate, a fluorinated benzothiophene, exemplifies our **building blocks for drug discovery** in antiviral and anti-inflammatory research. The fluorine atom fine-tunes electronic properties, while the ester group allows hydrolysis to carboxylic acids. As a **worldwide chemical supplier**, we deliver fused heterocycles for high-throughput screening, with **CRO chemical synthesis** services optimizing Heck reactions and fluorination protocols to meet diverse therapeutic development needs.