摘要：

OBJECTIVE To investigate the chemical constituents of the leaves of Engelhardtia roxburghiana.METHODS After the plant materials were extracted and fractionated with solvents,column chromatography was used to isolate and purify the compounds.The structures were elucidated on the basis of 1H-NMR,13C-NMR,MS analysis and comparison with the literature data.RESULTS Thirteen compounds were identified as following: taxilfolin(1),5,7,4′-trihydroxy flavanone(2),kaempferol(3),dihydrokaempferol(4),quercetin(5),isoengeletin(6),engeletin(7),astilbin(8),isoastilbin(9),kaempferol-3-O-α-L-rhamnoside(10),eucryphin(11),5-hydroxy-3,7,3′,4′-tetramethoxyflavone(12),quercetin-3-O-α-L-rhamnoside(13).CONCLUSION Compounds 2,4,9,11 and 12 were identified from the title plant for the first time.

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