Correction to: Nature Communications https://doi.org/10.1038/s41467-019-13428-3, published online 02 December 2019.

The original version of this Article contained an error in Fig. 5, in which the incorrect structure was shown for compound 4c. The correct version of Fig. 5 is:

which replaces the previous incorrect version:

This has been corrected in both the PDF and HTML versions of the Article.