After careful examination, we found that the structures [1] of compounds 1–4 in Figure 1 were not correct due to oversight. The oxygen atoms in the acyl groups of compounds 1–4 were missing. The authors would like to apologize for any inconvenience caused to readers by this correction. Replacing this figure will not affect the results or conclusions of the paper. The manuscript will be updated and the original will remain online on the article webpage, with reference to this correction.
Figure 1.
The structures of compounds 1–8.
Reference
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