How to import DOI from endnote


I want to export a bibliography from EndnoteX8 to Jabref.
I have used “BibTex export to jabref”.ens" from Jabref resources (endnote-Jabref filters).

However there is no DOI data appearing. Appreciate advice on how I can edit the output style to include the DOI information in endnote. Tried ‘DOI = {‘DOI’},’ but it did not work. Many thanks.

Correction: meant to use backtick DOI = {DOI}, which did not work. When I checked, DOI did not appear in outputted txt file, prior to importing to Jabref.