New hydrolysable tannin from Cibotium barometz.

Objective: To study the chemical constituents from Cibotium batometz.Method: Column chromatograph and HPLC were used to isolate and purify the compound,and the structure was elucidated on the basis of MS and NMR spectroscopic methods.Result: A new phenolic compound,4-O-caffeoyl-D-glucopyranose,has been isolated from the rhizome of C.barometz.The structure of the new compound was elucidated on the basis of chemical and spectroscopic methods,including intensive 1D,2D NMR and ESI-MS data analysis.Conclusion: 4-O-caffeoyl-D-glucopyranose was a new phenolic compound.