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pH-zone-refining CCC separation of F. bidentis crude extract. Experimental conditions: solvent system: MtBE-acetonitrile-n- butanol-water (4:1:1:5) with 3 mM TFA in the upper phase and 3 mM NH4OH in the lower phase; sample size: 1.4 g; other conditions are described in Figure 1 caption.
