Preparative isolation and purification of hydroxyanthraquinones from Rheum officinale Baill by high-speed counter-current chromatography using pH-modulated stepwise elution

Fuquan Yang, Tianyou Zhang, Guilian Tian, Qinhui Liu, Yoichiro Ito

Journal of Chromatography A · 1999 · 96 citations · 4 references

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