1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Sumedang, Indonesia.
2. Department of Chemistry, Faculty of Science and Technology, Sunan Gunung Djati Islamic University, Bandung 45262, Indonesia.
3. Department of Pediatric Dentistry, Faculty of Dentistry, Muhammadiyah University, Semarang 50273, Central Java, Indonesia.
4. Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 59100, Malaysia.
5. Department of Food, Life, and Environmental Science, Faculty of Agriculture,Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.