1. UPM-MAKNA Cancer Research Laboratory, Institute of Bioscience, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia
2. Department of Chemistry, Faculty of Science and Engineering, Swansea University, Swansea SA2 8PP, U.K.
3. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia
4. Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K.
5. Center for Cancer and Stem Cell Research, Development and Innovation (IRDI), Institute for Research, International Medical University, Kuala Lumpur 57000, Malaysia
6. Department of Microbiology, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia