7-氯-2H-1,4-苯并恶嗪

5-chloro-4H-1,4-benzoxazin-3-one

2,4-二羟基-2H-1,4-苯并噁嗪-3(4h)-酮

7-羟基-2H-苯并[b][1,4]噁嗪-3(4H)-酮

(3-oxo-4H-1,4-benzoxazin-7-yl) acetate