1. Laboratory of Natural Products, Institute of BioScience; Universiti Putra Malaysia; Serdang, Selangor Darul Ehsan Malaysia
2. Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences; Universiti Putra Malaysia; Serdang, Selangor Darul Ehsan Malaysia
3. Department of Medicine, Faculty of Medicine and Health Sciences; Universiti Putra Malaysia; Serdang, Selangor Darul Ehsan Malaysia
4. Laboratory of Food Crops, Institute of Tropical Agriculture; Universiti Putra Malaysia; Serdang, Selangor Darul Ehsan Malaysia