Objective:To study the chemical constituents of the extracts with 70% ethanol - water from the twigs and leaves of Pithecellobium Clypearia Bemth. Methods:The compounds were isolated with macroporous resin,polyamide,ODS,Sephadex LH-20,HPLC,etc. their structures were identified by means of spectral data and literature. Results:The chemical structures of 8 compounds were elucidated as( +)-catechin(I),( -)-(2S)-5,7,3',4',5'-pentahydroxyflavan(II),( -)-(2R)-5, 7,3',4',5'-pentahydroxyflavan(III),( -)-(2R,3R)-epigallocatechin-3-O-gallate(IV),3-(4'-hydroxy-3',5'-di-methoxyphenyl)-propane-1,2 -diol(V),3 -(4'-hydroxy-3'-methoxyphenyl)-propane-1,2 -diol(VI),chlorogenic acid ethyl ester( VII),4-O-β-D-Glucopyranosyl-trans-p-coumaric acid( VIII). Conclusion:Compounds V ~ VIII were isolated from this genus for the first time.
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