2. PUBCHEM:

http://pubchem.ncbi.nlm.nih.gov/
if you enter chlorpropamide which is the molecule use for the treatment of Type II diebetes it will give complete information about the structure and function of the molecule.

 PubChem provides information on the biological activities of small molecules. It is a component of NIH's Molecular Libraries Roadmap Initiative.
visit this page I have entered the molecule name
http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2727&loc=ec_rcs