Reaxys (Beilstein, Gmelin, Patent Chemistry) » Ce lien s'ouvre dans une nouvelle fenêtre / This link opens in a new windowReaxys is a web based database for searching an extensive collection of organic, organometallic, and inorganic chemistry data. It enables you to search chemical substances by structure, substructure, reaction, text, and property data. Reaxys is the merger of 3 chemical databases: Crossfire Beilstein, Crossfire Gmelin, and Patent Chemistry Database.