For chemistry, nanoscience, and related fields. Reaxys is based on the combined content of CrossFire Beilstein and Gmelin, and the Patent Chemistry Database (PCD). Reaxys contains experimental reaction and substance data extracted from the major organic, inorganic and organometallic chemistry literature, plus linked literature references. Allows researchers to identify and combine selected reaction steps to generate synthesis strategies. Substance searching includes (sub-)structure, generic and R-group searching, molecular formula, name, etc. Indexes multi-step reactions. Provides indexing and links to U.S. and European chemical and life science patents.