Figure 1.
HPLC chromatograms. (a) Mixed control sample. (b) Polygonum multiflorum Radix. (c) Polygoni multiflori Radix Preaparata. (d) Blank methanol. 1, emodin-8-O-β-D-glucopyranoside; 2, physcion-8-O-β-D-glucopyranoside; 3, emodin; 4, physcion.
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