分析了不同的离去基团和不同的保护基策略对糖肽合成的影响。
The factors which affect the results of glycopeptide synthesis were analyzed.
结论3，5 二硝基苯甲酰氧基作为良好的糖端基离去基用于寡糖的合成，具有反应条件温和、收率较高、立体选择性好的特点。
Conclusion The 3, 5-dinitrobenzoyl group was found to be a good leaving group at the anomeric position and O-glucopyranosides and oligosaccharides were stereoselectively synthesized in good yield.
巴基耶夫先生的离去加剧了首都两派人的焦虑：一方是填补空缺者，另一方则伺机夺位者。
Mr Bakiyev's departure aggravated the anxieties felt by both of the peoples there: that in a vacuum, the other side would seize power.
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