With the assistance of the Taiwan Forestry Bureau (TFB), UCL first extracted taxol from yew foliage and measured its concentration. They found that although the concentration of taxol varied at different seasons and in different parts of the foliage, high concentrations were not difficult to find.
在林務局支援下，化工所首先由紅豆杉枝葉萃取、分析紅豆杉醇含量，得知雖然紅豆杉隨著季節、枝葉部位不同，紅豆杉醇含量也有所不同，但找到含高紅豆杉醇的枝葉不難。