1,4-Benzoxazepine-7-acetic acid, 2,3,4,5-tetrahydro-9-hydroxy-5-oxo-, methyl ester 72766-06-4 BRN 1128194 Methyl 2,3,4,5-tetrahydro-9-hydroxy-5-oxo-1,4-benzoxazepine-7-acetate