9-hydroxy-6-methylpyrido[2,3-b][1,5]benzoxazepin-5-one

N-(2,4-dihydroxyphenyl)acetamide

7-hydroxy-3-methyl-1,4-benzoxazin-2-one

6-羟基-2-苯并噁唑啉酮

6-氨基-7-羟基-4-甲基香豆素