Correction to: Nature Communications https://doi.org/10.1038/ncomms14478, published online 17 February 2019.

This Article contains errors in Figure 1a. The chemical structure of compound 9 is incorrect. The configurational assignments for compounds 3, 5, 7 and 10 are incorrectly labeled as ‘17alpha’ and should be labelled as ‘16alpha’. The configurational assignments for compounds 4, 6, 8 and 11 are incorrectly labeled as ‘17beta’ and should be labelled as ‘16beta’. The configurational assignments for compounds 13 and 14 are incorrectly labeled as ‘17alpha’ and ‘17beta’ and should be labelled as ‘3beta’ and ‘3alpha’, respectively. The correct version of Fig. 1a is:

figure 1

Fig. 1

The error has not been corrected in the PDF or HTML versions of the Article.