38322-71-3 4H-1-Benzopyran-2-carboxylic acid, 6,8-dibromo-4-oxo-, ethyl ester 5-18-08-00318 (Beilstein Handbook Reference) BRN 1253901 Ethyl 6,8-dibromo-4-oxo-4H-1-benzopyran-2-carboxylate