38322-72-4 4H-1-Benzopyran-2-carboxylic acid, 8-bromo-6-methyl-4-oxo-, ethyl ester 5-18-08-00339 (Beilstein Handbook Reference) BRN 1383507 Ethyl 8-bromo-6-methyl-4-oxo-4H-1-benzopyran-2-carboxylate