1. Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, Indonesia.
2. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, Indonesia.
3. Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Nara, Japan.