bduchem.webnode.com
E-Database :: BDU CHEMISTRY
http://bduchem.webnode.com/e-database
Find a supplier for your specialty chemical needs. Search by structure, name, molecular formula, and CAS Number. After finding you compound, get an offer from one or more suppliers. I can't vouch for how this works in practice, but it sounds like a good idea. The EBI Search engine. A collection of about 3,500 compounds involved as enzyme substrates, products, inhibitors, and activators. On accepting a license agreement, the entire database can be freely downloaded in Chemical Markup Language format.
chemminetools.ucr.edu
ChemMine Tools
http://chemminetools.ucr.edu/about
ChemMine Tools was developed by Tyler Backman, Yiqun Cao, and Thomas Girke. ChemMine tools: an online service for analyzing and clustering small molecules. Backman TW, Cao Y, Girke T. Nucleic Acids Res. 2011 Jul ; 39(Web Server issue): W486-91. This service was developed with funding from the National Science Foundation (grant numbers ABI-0957099, 2010-0520325 and IGERT-0504249) and the NIH National Institute on Aging (grant number U24AG051129). NSF Grant 0957099 announcement.
facility.bioinformatics.ucr.edu
Databases - Bioinformatics Facility
http://facility.bioinformatics.ucr.edu/resources/databases
Bioassay and Phenotype Database (BAP DB). Old Chemical Genetics Page. Genome Cluster Database (GCD). Plant Expression Database (PED). Plant Unknown-eome Database (POND). Cell Wall Navigator (CWN). Kawaguchi and Bailey-Serres 2005. Mustroph et al. 2009. Nuclear Receptor DNA Binding Project.