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![Benzo[b]furan-7-carboxylic acid, 97%](https://www.labchem.co.za/84315-superlarge_default/benzobfuran-7-carboxylic-acid-97.jpg)
![Benzo[b]furan-7-sulfonyl chloride, 97%](https://www.labchem.co.za/84316-small_default/benzobfuran-7-sulfonyl-chloride-97.jpg)