1. Department of Chemistry; Annamalai University; 608002 Annamalainagar India
2. Department of Chemistry; Indian Institute of Technology-Madras; Adyar 600036 Chennai India
3. Strides-Shasun pharmaceuticals Ltd; Vandalur-Kelambakkan Rd. 600127 Chennai India
4. Department of Biotechnology; Indian Institute of Technology-Madras; Adyar 600036 Chennai India