6-[2-(m-tolyl)acetyl]-4H-1,4-benzoxazin-3-one

(3-oxo-4H-1,4-benzoxazin-2-yl) acetate

(2-硝基苯氧基)-乙酸肼

7-甲氧基-2H-苯并[b][1,4]噁嗪-3(4H)-酮

6-氯-2H-1,4-苯并噁嗪-3(4H)-酮