Rhea is a manually annotated database of chemical reactions.

All data in Rhea is freely accessible and available for anyone to use.

Last release: 84.

Rhea release 84

A new release of Rhea, the annotated database of biochemical reactions, is available...
Check also the most recent publication of Rhea:

Updates in Rhea - a manually curated resource of biochemical reactions

available at PubMed or Nucleic Acid Research

Rhea is a collaborative effort between the Swiss-Prot Group at the SIB Swiss Institute of Bioinformatics and the EMBL-EBI.
Rhea makes use of ChemAxon's Marvin tools.