[Study on Chemical Constituents from Roots of Lonicera macranthoides].

OBJECTIVE: To study chemical constituents of the roots of Lonicera macranthoides. METHODS: The chemical constituents were isolated and purified by means of several chromatographic techniques and their structures were elucidated by spectroscopic methods. RESULTS: Seven compounds were isolated and identified as ribenol (1), excoecarin C (2), 18-hydroxy-13-epi-manoyloxide (3), asiatic acid (4), oleanolic acid (5), β-sitosterol (6) and β-daucosterol (7). CONCLUSION: Compounds 1-4 are obtained from this genus for the first time. Compound 5 is obtained from this plant for the first time. All the compounds are found from the roots of Lonicera mac- ranthoides for the first time.