Research progress in Laggera medicinal plants / 中国中药杂志

This paper reviewed the worldwide research progresses of the genus Laggera both on phytochemical and pharmacological work in the past few decades. The main secondary metabolites of this genus are proved to be sesquitepenoids, flavonoids and phenolic acids. Phamacological investigations revealed that the certain extracts of some Laggera species possess significant bioactivities on anti-inflammation, anti-tumor and anti-viral infection. This review afforded the comprehensive description of the active components as to provide useful references to elucidate their historical clinical application on upper respiratory infection, influenza, parotitis, and recurrent herpes viral infection.

Laggera pterodonta--a Yunnan Herbal Medicine / 浙江大学学报·医学版

OBJECTIVE: A systematic study of Laggera pterodonta was performed in order to identify its bioactive compounds. METHODS: Solvent partition and column chromatography used to isolate and purify Laggera pterodonta compounds. The isolated compounds were further elucidated by high field NMR spectroscopy. RESULTS: Fifty-two compounds were separated and the structures of 39 compounds were elucidated. Twenty-four compounds have not been previously reported. For example, the structure of compound 19, a previously undetected compound was elucidated as 4gamma, 9alpha,11-triol-enantio-eudesmane using both 1D and 2D NMR spectroscopy. Major secondary metabolites of the Laggera pterodonta included eudesmane-type sesquiterpenes and flavone derivatives. CONCLUSION: A systematic study of a yunnan herbal medicine Laggera pterodonta resvealed several novel compounds that may have clinical significance. Further in vivo animal studies should be performed to assess their bioactive role.