methyl 2-[(2-chloroacetyl)amino]-2-dimethoxyphosphorylacetate

methyl 2-dimethoxyphosphoryl-2-formamidoacetate

2-dimethoxyphosphoryl-2-(phenylmethoxycarbonylamino)acetic acid

methyl 2-amino-2-dimethoxyphosphorylacetate,oxalic acid

2-(苄氧基羰基氨基)-2-(四氢吡喃-4-基)乙酸甲酯