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

H-半胱氨酸-甘氨酸-OH

N-苄氧羰基-甘氨酰-甘氨酸

草酸

2-[[2,2,5,5-tetrakis(trifluoromethyl)-1,3-oxazolidine-4-carbonyl]amino]acetic acid