Yusuf , Hanifah, Mustofa, Agus Wijayanti M, and Asmah Susidarti R. 2013. “SEMISYNTHESIS AND BIOLOGICAL EVALUATION OF EURYCOMANONE DERIVATIVES AS NEW ANTIMALARIAL ”. International Research Journal of Pharmaceutical and Applied Sciences 3 (6), 4-7. https://scienztech.org/index.php/irjpas/article/view/576.