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.
References
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