washing the product with methanol and ether for several times, separating to purify, re-crystallizing, vacuum drying at room temperature and storing in a drier at -20 deg.c.
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It is meaningful and significant to take further research of these natural resourcesThe relatively mature method for purifying betulin is recrystallizing betulin in chloroform-methanol mixture solvent.
在白桦脂醇的纯化方面目前比较成熟的方法是氯仿—甲醇混合溶剂重结晶来提纯白桦脂醇，本论文通过正交设计，得到最优化的溶剂比例和用量。
参考来源 - 白桦脂醇的纯化及其衍生物的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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