Figure 2.

A A chromatogram of pure standards: (1) naringin, (2) hesperidin (3) aloe emodin, (4) rhein, (5) honokiol, (6) magnolol, (7) emodin, (8) chrysophanol and the internal standard (IS), 1, 8-dihydroxyanthraquinone. B Simultaneous determination of eight markers: (1) naringin, (2) hesperidin (3) aloe emodin, (4) rhein, (5) honokiol, (6) magnolol, (7) emodin, (8) chrysophanol and the internal standard (IS), 1, 8-dihydroxyanthraquinone, in a Dachengqi Tang sample.