1. Department of Chemistry, Hawassa College of Teacher Education, Ethiopia
2. Department of Chemistry, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia
3. School of Plant Sciences, Haramaya University, Ethiopia
4. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, Madrid 28049, Spain
5. Department of Applied Chemistry, Adama Science and Technology University, Ethiopia