1. The results show that before aminomethylation reaction the Emblic extracts have to be treated with the protective agent X in order that the mocified products can dissolve in water.
   结果表明：在设计试验条件下，柚柑栲胶的胺甲基化反应需用保护剂X处理，才能保证改性产物的水溶解性；

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