N-苯甲酰基甘氨酸甲酯

4-苯亚甲基-2-苯基-2-噁唑英-5-酮

4-(1-methoxycarbonyl-2,2,2-trifluoroethylidene)-2-phenyl-2-oxazolin-5-one

三苯基氧化膦

2-phenyl-4-hexafluoroisopropylidene-2-oxazolin-5-one