2-[[2-[(2,2-diphenylacetyl)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-aminoacetyl)-[4-[(2-aminoacetyl)-(carboxymethyl)amino]-4-oxobutanoyl]amino]acetic acid

({[(4-甲基苯基)磺酰基]氨基}乙酰基)氨基]乙酸

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