Betulin palmitate软脂酸桦木脑酯
Betulin caffeate咖啡酸桦木醇酯
Betulin diacetate桦木脑二乙酸;白桦醇双乙酰酯
Betulin acid白桦酯酸
Betulin n diacetate桦木脑二乙酸
Sicista betulin'北部蹶鼠
Betulin HPLC grade白桦苷
D Betulin impurity D白桦脂醇
G Betulin impurity G白桦脂醇
The study of betulin acid is more which focus on its anti-tumor and anti-HIV effects. Betulin is believed to be bactericidal, anti-virus, anti-UV, and a synthetic resin birchprecursor of betulin acid and its derivatives.
近年来,对白桦脂酸的研究较多,主要应用于抗肿瘤和抗HIV方面,对白桦脂醇的研究较少,一般认为其作用主要在于杀菌、抗病毒、防紫外线及作为合成白桦脂酸及其衍生物的前体。
After recrystallized from ethanol pure betulin(>95%)was obtained, yield 20%. Then, it was synthetically converted to betulinic acid by Jones'oxidation and sodium borohydride reduction.
其次，从白桦树皮中提取分离了大量纯度超过95％的桦木醇，然后利用琼斯氧化和硼氢化钠还原，由桦木醇合成了桦木酸。
参考来源 - 桦木酸及其衍生物的合成与抗肿瘤活性的研究In the third chapter the reaction of betulin glycosylation was discussed.
本论文讨论了白桦脂醇糖苷化反应的实验过程。
参考来源 - 白桦树皮中活性成分的提取分离及其衍生物的制取研究The content of betulin in different parts of birch was:bark＞branch skin＞inside skin＞bud＞leaf＞root＞pollen.
白桦酯醇在白桦不同部位的含量依次分别为:外皮＞枝皮＞内皮＞芽＞叶＞根＞花粉。
参考来源 - 促进白桦（Betula platyphylla Suk.）培养物中三萜物质积累的初步研究