1. Antitargets (Eds: R. Vaz, T. Klabunde), Wiley-VCH, Weinheim, 2008, p. 480.
2. NIH Molecular Libraries Initiative
3. PubChem is available online at the National Center for Biotechnology Information, http://pubchem.ncbi.nlm.nih.gov/
4. Chembldb is available online from the European Bioinformatics Institute, http://www.ebi.ac.uk/chembldb/index.php