(3a-m) and substituted hydrazines in methanol. Some of the compounds exhibited promising in vitro antimalarial activity for chloroquine sensitive CQS (3D7) strain and chloroquine resistant CQR (RKL9) strain. The most potent analogue 4i (IC50 0.322 μg/ml) exhibited significant in vivo antimalarialpotential against Plasmodium berghei mouse model. The stable complex of 4i with hematin (1:1 stoichiometry)