3(2H)-BENZOXAZOLECARBOXYLIC ACID, 6-BROMO-2-OXO-, ETHYL ESTER 6-Bromo-2-oxo-3(2H)-benzoxazolecarboxylic acid ethyl ester 6-Bromo-3-etoksykarbonylobenzoksazolinon-2 [Polish] 74182-45-9