1. Department of Chemistry, Gauhati University, Guwahati 781014, Assam, India
2. Research & Development Centre, Cipla Ltd, L B S Marg, Vikhroli, Mumbai 400083, India
3. Department of Chemistry, NIT Meghalaya, Bijni Complex, Laitumkhrah, Shillong 793003, Meghalaya, India
4. Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Canada