The Saussurea involucrata chemical composition was: alkaloid, flavanone, sterol, volatile oil, 16 kind of amino acids, Saussurea involucrata lactone and so on.

雪莲化学成分为：生物碱、黄酮、甾醇、挥发油、16种氨基酸、雪莲内酯等。

Method: Analyzing the content of volatile oil by pharmacopoeia method.

方法：用药典方法对挥发油进行含量测定。

Methods The volatile oil was obtained from PPFA by steam distillation.

方法采用水蒸气蒸馏法从枳壳中提取挥发油。

OBJECTIVE:To analyze qualitatively the volatile oil in Perilla leaves.

目的：定性分析紫苏叶的挥发油。

Pepper seeds contain volatile oil, resins, piperine, fat, protein, etc.

胡椒中含有挥发油、树脂、胡椒碱、粗脂肪、粗蛋白等。