X-Labs

Chemical Abstracts Service database. Indexes science journals as well as patents. Allows searching by research topic, substance structure, and chemical reaction scheme. In order to use SciFinder, you must register for an account using your Gatorlink username and password. After you have received confirmation of your registration, you can log in here. Help and tutorials can be found here.

Reaxys is the successor to the CrossFire/Gmelin databse. It is a chemical literature database that allows for searching by structure, property, or bibliographic field. It combines the Beilstein and Gmelin compound databases, as well as a patent database.

Maintained by NIH, PubMed primarily indexes biomedical-related sources.