Andrew G. Mtewa & Chukwuebuka Egbuna 
Poisonous Plants and Phytochemicals in Drug Discovery [PDF ebook] 

ANDREW G. MTEWA trained in Medicinal Chemistry for his Ph D under the WCAIR at the University of Dundee in Scotland and also at the Mbarara University of Science and Technology in Uganda. He teaches Chemistry at the Malawi University of Science and Technology in Malawi.
CHUKWUEBUKA EGBUNA, MICCON, AMRSC, is a chartered chemist, a chemical analyst, and an academic researcher. He obtained his BSc and MSc degrees in Biochemistry at Chukwuemeka Odumegwu Ojukwu University, Anambra State, Nigeria. He is a Ph D fellow in Nutritional Biochemistry/Toxicology with the World Bank Africa Centre of Excellence for Public Health and Toxicological Research (ACE-PUTOR), University of Port-Harcourt, Rivers State, Nigeria.
DR. G. M. NARASIMHA RAO is an Associate Professor of Botany at Andhra University, where he also obtained his MSc in Botany and M.Phil in Marine Algal Ecology.