1. Department of Chemistry; University of Delhi; Delhi 110007 India
2. Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy; The University of Rhode Island; Kingston Rhode Island 02881 USA
3. School of Pharmacy, Chapman University; One University Drive; Orange CA 92866 USA
4. Department of Chemistry; Deenbandhu Chhotu Ram University of Science & Technology; Murthal 131039 Haryana India
5. Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC); Department of Chemistry, KU Leuven; Celestijnenlaan 200F B-3001 Leuven Belgium