You can use your ACS ChemWorx Desktop app to import your existing references from Mendeley, Zotero, EndNote, and CiteULike as well as files in RIS, BibTeX, and PDF formats.
There are a number of ways to import your references from your existing reference libraries. Each reference manager exports and imports differently. You can view the following links to see how to import Libraries in to ACS ChemWorx from:
Mendeley Instructions Here
Zotero Instructions Here
CiteULike Instructions Here
EndNote Instructions Here
RIS, BibTeX, and PDF files Instructions Here