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1·The toxicity of the plant is due to the naturally occurring tropane alkaloids.

这种植物的毒性来自自然产生的莨菪烷类生物碱。

2·OBJECTIVE to synthesize and screen tropane derivatives with cholinergic activity and subtype-selectivity of M1 receptor.

目的设计、合成并筛选具有胆碱能活性，且对M1受体有选择性的莨菪烷衍生物。

3·Objective By analyzing the NMR spectra of analogs of Baogongteng a, tropane alkaloids, the effects of structural variations on chemical shifts of resonance signals were investigated.

目的通过对包甲素类似物nmr谱的分析，考察其结构差别对共振信号化学位移的影响。