[A new isoflavone from Huoxue Yiqi Tang].

OBJECTIVE

To study the chemical constituents in the active parts of Huoxue Yiqi Tang.

METHOD

The silica gel, Sephadex LH-20 were used to isolate the compounds, El, FAB-MS and 1D, 2D-NMR were used to identify the obtained compounds.

RESULT

14 compounds were obtained from the prescription.

CONCLUSION

They were all first time obtained from the prescription. Among them, 7, 3'-dihydroxyl-5'-methoxyisoflavone is new.