1. Computational Chemistry Group Department of Chemistry Faculty of Science University of Mauritius Moka, Réduit 80837 Mauritius
2. Centre for Natural Product Research Department of Chemical Sciences University of Johannesburg, Doornfontein Johannesburg 2028 South Africa
3. Atatürk University Science Faculty, Department of Chemistry Erzurum 25240 Turkey
4. Department of Chemical and Process Engineering Jubail Industrial College Jubail Industrial City 31961 Saudi Arabia
5. Department of Organic Chemistry University of Valencia Dr. Moliner 50 E-46100 Burjassot Valencia Spain