1. Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 1 India
2. Indian Council of Agricultural Research; National Bureau of Agriculturally Insect Resources; Bangalore 560 024 India
3. School of Chemistry; University of Edinburgh; David Brewster Road, Joseph Black Building EH9 3JF United Kingdom
4. Indian Association of Cultivation of Science; Kolkata 700032 India