4-羟基-1-甲基-2(1H)-喹啉酮

acetic acid,5-methyloxolan-2-ol

4-烯丙基苯基乙酸酯

acetic 2-(2-oxo-benzothiazol-3-yl)-acetimidic anhydride

2-(2-oxo-1,3-benzothiazol-3-yl)acetonitrile