This article is retracted.
The data in this article  was used without permission by the lead author Muhammad Rashid Siddique.
The lead author accepts full responsibility and would like to apologize to the owners of the data (Dr Steve Shnyder, University of Bradford, UK), as well as the co-authors of this article, the Editors and readers.
Chem Central J 2012, 6:69. BioMed Central Full Text