1. Department of Chemistry, University of Dschang, Cameroon
2. Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Rock lands, Udhagamandalam 643 001, India
3. Ragavendra Institute of Pharmaceutical Sciences, Anantapur, India
4. Department of Pharmacognosy & Phytomedicine, JSS College of Pharmacy, JSS Academy of Higher Education & Research Mysore, Karnataka, India