4-马来酰亚胺丁酸

N-BOC-GAMMA-氨基丁酸

4-[(1,3-dimethyl-6-nitro-2,4,5-trioxo-8H-pyrido[2,3-d]pyrimidin-7-yl)amino]butanoic acid

γ-胍丁酸

2-羟基-4-氨基丁酸