Setzer W N, Setzer M C, Bates R B, Jackes B R
Planta Med. 2000 Mar;66(2):176-7. doi: 10.1055/s-2000-11129.
The crude chloroform bark extract of Syncarpia glomulifera (Myrtaceae) shows antibacterial and cytotoxic activity. Bioactivity-directed separation led to the isolation of oleanolic acid-3-acetate, ursolic acid-3-acetate and betulinic acid. The relatively large abundance (10% of the crude extract) and high degree of activity of betulinic acid are responsible for the bioactivity of the crude bark extract.
团花树（桃金娘科）的粗制氯仿树皮提取物具有抗菌和细胞毒性活性。通过生物活性导向分离，得到了齐墩果酸-3-乙酸酯、熊果酸-3-乙酸酯和桦木酸。桦木酸相对较高的含量（占粗提取物的10%）和高活性是树皮粗提取物具有生物活性的原因。
