2H-1,4-Benzoxazine-6-acetic acid, 3-(4-bromophenyl)-, ethyl ester 3-(4-Bromophenyl)-2H-1,4-benzoxazine-6-acetic acid ethyl ester 86818-21-5 BRN 4534315 Ethyl 3-(4-bromophenyl)-2H-1,4-benzoxazine-6-acetate