Correction: Yan, R.Y., et al. HPLC-DPPH Screening Method for Evaluation of Antioxidant Compounds Extracted from Semen Oroxyli. Molecules 2014, 19, 4409–4417

The authors wish to inform readers that there is an error in the chemical structures shown in Figure 4 of this paper [1]. The structure shown in the bottom left corner is an extremely unlikely type of radical. Following the proposed route, it should yield an ortho-quinone (without the unpaired electron) and a pyranosyl sugar free radical. The ortho-quinone should then undergo nucleophilic attack by MeOH to form the product. The corrected Figure 4 is shown below.

Figure 4. Plausible reaction route of flavonoid glycosides with DPPH, using baicalein-7-O-glucoside as an example.

Figure 4. Plausible reaction route of flavonoid glycosides with DPPH, using baicalein-7-O-glucoside as an example.

The authors apologize for any inconvenience caused to the readers by these changes. We will update the paper [1] and the original will remain available on the article webpage.