Chemical Constituents of Butanol Fraction of Euscaphis japonica

Objective:To learn the chemical constituents of the butanol fraction of Euscaphis japonica.Method:Various column chromatographies(CCs) including MCI CC,RP-18 CC and semipreparative HPLC were employed for the isolation and purification of the constituents and their structures were determined by spectral analysis and chemical evidence.Result:Seven compounds were isolated and identified as corchoionoside C(1),ellagic acid(2),junipetrioloside A(3),3,3'-di-O-methylellagic acid-4'-O-β-D-glucopyranoside(4),3,3'-diO-methylellagic acid-4'-O-α-D-arabinfuranoside(5),3,3'-di-O-methylellagic acid-4'-O-β-D-xylopyraoside(6) and 3,3'-di-O-methylellagic acid(7).Conclusion:All compounds were isolated from E.japonica for the first time.