Methods Volatile oil from Clematis obscura was extracted by steam distillation, and its chemical components and relative contents were separated and analyzed by GC/MS.

• 方法水蒸气蒸馏法提取秦岭铁线莲的挥发性化学成分,气相色谱质谱分离并分析鉴定各成分及其相对含量。