1. Chemistry Laboratory, Faculty of Sciences, University of Douala, Douala, Cameroon
2. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
3. Jodrell Laboratory, Natural Capital and Plant Health Department, Royal Botanic Gardens, Kew, Richmond, Surrey, UK
4. Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, UK
5. Pakistan Council of Scientific and Industrial Research, Karachi, Pakistan
6. Multi-Disciplinary Research Laboratory, Bahria University Medical and Dental College, Karachi, Pakistan