2,4-二甲氧基苯胺

4-乙酰氧基-7-甲氧基-2H-1,4-苯并恶嗪-3(4H)-酮

Boc-L-酪氨酸乙酯

7-methoxy-4-(1-methyl-4-oxo-2,5-cyclohexadien-1-yl)-2H-1,4-benzoxazin-3(4H)-one

4-hydroxy-7-methoxy-1,4-benzoxazin-3-one