1. Introduction
Malaria is a major health problem in many developing countries, mostly in Africa and Southeast Asia (Snow et al., 2005). According to WHO report on malaria (2007), 40% world’s population is living with risk of malaria, over 1.5 million death occur per year and the cost of malaria treatment is $1800 million US dollar. The first effective antimalarial drug was quinine, which was isolated from the bark of cinchona. Since then malaria has been treated with quinoline based drugs. However, Plasmodium falciparum developed resistant globally against two of the most common antimalarial drugs: chloroquine and the combination sulphadoxine/pyrimethamine (Ridely, 2002).