1. Department of Biology, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;
2. Xiamen University Malaysia, Sepang, Selangor, Malaysia;
3. Horticulture Research Centre, Malaysian Agriculture Research and Development Institute, MARDI Headquarters, Serdang, Selangor, Malaysia;
4. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;
5. Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia