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Study on Flavonoids Constituents of Blumea balsamifera

YAN Qi-xin,TAN Dao-peng,KANG Hui,FENG Han-lin,ZENG Wei-zhen(Shenzhen Neptunus Pharmaceutical Company Limited,Shenzhen 518057,China)  
Objective:To study the flavonoids constituents of the aerial parts of Blumea balsamifera.Method:The compounds were isolated and purified by silica gel,Sephadex LH-20,medium pressure column chromatography,and their structures were elucidated by spectral methods and chemical analysis.Result:Twelve compounds were isolated and their structures were identified as 3,3',5,5',7-pentahydroxyflavanone(1),3,3',4',5-tetrahydroxy-7-methoxyflavanone(2),chrysoeriol(3),3',4',5-trihydroxy-3,7-dimethoxyflavone(4),diosmetin(5),3,3',4',5-tetrahydroxy-7-methoxyflavone(6),3,5-dihydroxy-3',4',7-trimethoxyflavone(7),chrysosplenol C(8),3,3',5-trihydroxy-4',7-dimethoxyflavanone(9),blumeatin(10),3,3',5,7-tetrahydroxy-4'-methoxyflavanone(11),3',5,5',7-tetrahydroxyflavanone(12).Conclusion: Among them,compounds 1,3-5 and 8 were isolated from the genus Blumea for the first time,and compounds 6,7 were isolated from B.balsamifera for the first time.
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