The residue was reextracted twice as described above. The combined hot water extracts were freeze dried, respectively. The dried extract was redissolved in water or ethanol to a concentration of 50 mg/mL and stored at 4 C before use.
The residue was reextracted twice as described above. The combined hot water extracts were freeze dried, respectively. The dried extract was redissolved in water or ethanol to a concentration of 50 mg/mL and stored at 4 C before use.