Suryati1,*, Dira Hefni2, Fatma Sri Wahyuni2, Dachriyanus2
1Department of Chemistry, Universitas Andalas, Kampus Limau Manis, Padang, West Sumatra 25163, INDONESIA.
2Faculty of Pharmacy, Universitas Andalas, Kampus Limau Manis, Padang, West Sumatra 25163, INDONESIA.