作者报道从产于加利福尼亚的田基麻科植物P.ixodes中分离到了六种能引起过敏性接触皮炎的酚类成分. 新鲜的植物全草3公斤,用丙酮提取三次(每次5～10秒),浓缩提取液(50克),分别用己烷、氯仿、水溶解成三部分.再应用硅胶柱层析,洗脱剂 The authors reported that six phenolic compounds that cause allergic contact dermatitis were isolated from P.ixodes, a Californian-originated plant. The fresh plant is 3 kg of whole plants and extracted three times with acetone (5 to 10 seconds each). The extract was concentrated (50 g) and dissolved in hexane, chloroform and water to form three fractions. After silica gel column chromatography, eluent