白桦脂酸

实验证明白桦脂酸不失为一种很有前途的抗宫颈癌中药。

Betulinic acid is proved out a good promising medicine by this experiment .

白桦脂酸对人多发性骨髓瘤细胞系RPMI-8226凋亡的诱导

Effect of Betulinic Acid on Inducing Apoptosis of Human Multiple Myeloma Cell Line RPMI-8226

运用波谱，尤其是13C－NMR分析鉴定19α－羟基乌苏酸和2α－羟基白桦脂酸的结构，归属了这两种五环三萜酸各碳的13C核磁共振谱δ值。

The structures of pomolic acid and alphitolic acid were identified by spectra , especially 13 C NMR . The 13 C NMR signals of the compounds werc also assigned .

23-羟基白桦脂酸的30位羟基衍生物的合成及其抗肿瘤活性

Synthesis and anti-tumor activity of 30-hydroxy derivatives of 23-hydroxy betulinic acid

白桦脂酸是难溶性药物，可以通过增加药物的溶出度，进而提高药物的生物利用度。

The bioavailability of betulic acid preparation can be increased by increasing the dissolution rate and the solubility .

选用白桦脂酸为对照品，5%香草醛-冰醋酸和高氯酸为显色剂，对皂角刺中白桦脂酸型三萜类化合物的含量进行测定。

The content of the lupane-type triterpenoids was quantified by Spectrometry method using betulinic acid as standard and 5 % vanillin - glacial acetic acid & perchloric acid as colour - developing agents .

白桦脂醇和白桦脂酸是非常有价值的天然产物。

Betulin and betulinic acid are remarkable natural products .

白桦脂醇、白桦脂酸的研究进展及其前景

Research progress and foreground of betulin and betulinic acid

利用GC色谱法测定了长白山白桦树皮中白桦脂醇和白桦脂酸的含量。

The contain of betulin and betulinic acid are analyzed by GC .