glycylglycine N-methylamide

2-[[2-[[2-[(2-isocyanoacetyl)amino]acetyl]amino]acetyl]amino]acetic acid

N-[N-[(1,3-二氢-1,3-二氧代-2H-异吲哚-2-基)乙酰基]甘氨酰]甘氨酸

2-[[2-[[2-(2-methylprop-2-enoylamino)acetyl]amino]acetyl]amino]acetic acid

2-[[2-[[2-(2,4-dinitroanilino)acetyl]amino]acetyl]amino]acetic acid