1. Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia;
2. Centre for Biodiversity Research, Universiti Tunku Abdul Rahman, Kampar, Malaysia;
3. Department of Agricultural and Food Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia;
4. Institute of Chinese Medical Sciences, SKL of Quality Research in Chinese Medicine, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China