7-methoxy-4H-1,4-benzoxazine-2,3-dione

2,4-二羟基-7-甲氧基-2H-1,4-苯并噁嗪-3(4H)-酮

methyl α-(5-methoxy-2-nitrophenoxy)-α-methoxyacetate

5-甲氧基-2-硝基苯酚

2-氨基-5-甲氧基苯酚