Methods: Amide and mix-type bonds compounds were synthesized by conjugated the amino groups and acid groups with hydroxyl or acid links.
方法：四种药物通过酯化、酰胺反应由不同的连接子合成酰胺类和混合键类互联体前药。
For the pairs of these compounds, the chemical shifts of protons on amide nitrogen and the UV spectra arc helpful for assigning configuration.
对于成对的化合物，酰胺氮上质子的化学位移及紫外光谱亦有助于判断构型。
The mechanism of the formation of poly-amide-imide was discussed by using appropriated model compounds.
利用模型化合物对聚酰胺-酰亚胺形成的机理进行了研究。
The mechanism of the formation of poly-amide-imide was discussed by using appropriated model compounds.
利用模型化合物对聚酰胺-酰亚胺形成的机理进行了研究。
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