1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Andalas University, Kampus Limau Manis, Padang, West Sumatera, 25163, Indonesia.
2. Department of Biochemistry, Faculty of Medicine, Andalas University, Padang, 25163, Indonesia.
3. Faculty of Pharmacy, Andalas University, Padang 25163, Indonesia.
4. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Padang 25173, Indonesia.