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Chemical constituents of coumarins from flowers of Koelreuteria paniculata

REN Lu,ZHANG Lu,BAO He,YOU Xiaojuan,TIAN Di,DOU Fang,WANG Junxian(Department of Pharmacy,School of Medicine,Xi'an Jiaotong University,Xi'an 710061,China)  
Objective To research the chemical constituents from flowers of Koelreuteria paniculata Laxm..Method The chloroform fraction from flowers of Koelreuteria paniculata Laxm.was separated and purified by silica gel and polyamide column chromatography.The physicochemical property and spectral analysis were used to identify the compounds structure.Results Three compounds were obtained and identified as β-sitosterol(Ⅰ),acetyl-umbelliferone(Ⅱ) and 6-benzoyl-umbelliferone(6-benzoyl-7-hydroxylcoumarin)(Ⅲ).Conclusion Two coumarins were isolated for the first time from the genus:acetyl-umbelliferone and 6-benzoyl-umbelliferone(6-benzoyl-7-hydroxylcoumarin).These compounds were isolated for the first time from flowers of Koelreuteria paniculata Laxm.
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