二萜类化合物是由4分子异戊二烯聚合而成的衍生物。
同时含有少量倍半萜和二萜类物质。
The volatile substance contained a little of sesquiterpenes and diterpenoids.
结论：豨莶草抗血栓有效组分以二萜类成分为主。
Conclusion: Diterpenoids were main compounds in the antithrombotic fraction of Herba Siegesbeckiae.
本主综述了二维核磁共振谱在测定二萜类生物碱结构中的最近进展。
The up-dated applications of 2D—NMR techniques in determining the structures of some diterpenoid alkaloids are reviewed.
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