1. Post-Graduate and Research Department of Chemistry; The New College (Autonomous); Chennai 600 014 India
2. Department of Chemistry; Indian Institute of Technology Bombay; Mumbai 400 076 India
3. Department of Chemistry; Texas A & M University; College Station; TX 77842 USA
4. Department of Pharmaceutical Chemistry; Swamy Vivekanandha College of Pharmacy, Elayampalayam; Tiruchengodu 637 205 India.
5. CAS in Crystallography and Biophysics; University of Madras; Guindy Campus; Chennai 600 025 India