1-(1H-benzimidazol-2-yl)-N-(1H-benzimidazol-2-ylmethyl)methanamine

butyl 2-[(2-butoxy-2-oxoethyl)amino]acetate

{(羧基甲基)[(4-甲基苯基)磺酰基]氨基}乙酸

N,N-二(羧甲基)-β-氨基丙酸