2-甲基乙酰乙酸乙酯

2-甲基-2-恶唑啉

3-acetyl-4-chloro-1,3-oxazolidin-2-one

3-acetyl-5-chloro-1,3-oxazolidin-2-one

3-乙酰基噁唑烷-2-酮