Study on triterpenes of Microtropis tiflora

Objective: To study the chemical constituents of Microtropis triflora.Method: The compounds were isolated by chromatography on silica gel and Sephadex LH-20.There structures were elucidatedby by chemical methods and spectral analysis.Result: Five triterpenoids were isolated and elucidated as friedelin(1),3-oxo-28-friedelanoic acid(2),29-hydroxy-3-friedelanone(3),salaspermic acid(4),orthosphenic acid(5).Conclusion: Compounds 1-5 are all isolated from M.triflora for the first time.