方法与结果：按照常规的方法提取出石杉总生物碱，用HPLC对总碱直接进行分析。
Methods and Results: Total alkaloids of Huperziaceae were extracted by routine method and used directly for the HPLC analysis.
相对于碱性橄榄玄武岩，白榴石碱玄岩来自于更加富集的地幔源区，其地幔的部分熔融程度相对较低。
Leucite tephrite was derived from the more enriched mantle source with lower degree of partial melting of mantle source than alkaline olivine basalt.
结论：石杉碱甲能有效改善脑器质性疾病患者记忆和认知能力，具有较好的疗效。
CONCLUSION: Huperzine a can effectively improve memory and cognitive function in patients with organic brain diseases and has good curative effects.
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