Imam Bagus Sumantri1,*, Henny Sri Wahyuni2, Lolyta Fiti Mustanti3
1Department of Biology, Faculty of Pharmacy, University of Sumatera Utara, Medan, INDONESIA.
2Department of Chemistry, Faculty of Pharmacy, University of Sumatera Utara, Medan, INDONESIA.
3Faculty of Pharmacy, University of Sumatera Utara, Medan, INDONESIA.