2-benzyl-4-(ethoxymethylidene)-1,3-oxazol-5-one

2-benzyl-4-(dimethylaminomethylidene)-1,3-oxazol-5-one

2-[[2-(4-nitrophenyl)acetyl]amino]acetic acid

N-(2-苯基乙酰基)-甘氨酸甲酯