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(a) HPLC chromatogram of YSPDF: (1) calycosin glucoside, (2) aloe-emodin emodin, (3) rhein, (4) emodin, (5) chrysophanol, and (6) physcion. (b) HPLC chromatogram of standard solution: (1) calycosin glucoside, (2) aloe-emodin emodin, (3) rhein, (4) emodin, (5) chrysophanol, and (6) physcion.
