[Terpenoid compounds isolated from Ligularia sagitta]

Abstract

Objective: To study the chemical constituents of radix and rhizome of Ligularia sagitta.

Method: Isolation and purification were carried out on the column chromatography of silica gel and sephadex LH -20. The structures were identified by spectral analysis.

Result: Seven terpenoid compounds were isolated from the radix and rhizome of L. sagitta. Five of them are sesquiterpenoids, the structures were determined as 7alpha-hydroxy-9(10) -ene-1, 8-dioxo-6, 7-dihydrofuranoeremophilane (1), 1p, 10P3-epoxy-6beta, 8 beta-dihydroxy-eremophil7 (11) -en-12, 8alpha-olide (2) , 1-oxo-9-desoxycacalol (3), benzofuranoeremophil-l-ene (4) and bakkenolide (5); other two compounds belong to triterpenoid. 3p, 16P3-dihydroxy-12-oleanen-28-al (6) and lupeol (7).

Conclusion: Compoundsl-3 and 6 were: isolated from L. sagitta for the first time, and compounds 3 and 6 were obtained from Ligularia for the first time.