Compounds and reactions in enviPath can be automatically linked to external databases.At the compound level, we've integrated links to PubChem, ChEBI, and KEGG. Reactions, on the other hand, can now be directly linked to Rhea, a curated database of biochemical reactions.To do so one can go to a specific page for a package, pathway, compound, compound structure or reaction that the user has created, and select the “Update References” option on the “Actions” dropdown. This will trigger an automatic workflow that will link the compounds and reactions to external databases.The “Update References” functionality on the Package page, will update all the compounds and reactions of the package, while for the Pathway page only the compounds and reactions within the pathway will be updated and allowing reaching the highest granularity on compound, compounds structure and reaction page. In order to avoid unnecessary usage of enviPath’s resources, the references can be updated only once per compound or reaction. If new references want to be added please contact us.