Institution: | 1. Department of Natural Products, Graduate School of Pharmaceutical Sciences, Kumamoto University, Oe-honmachi 5-1, Kumamoto 862-0973, Japan;2. Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, United States;3. Department of Pharmaceutical Biochemistry, Graduate School of Pharmaceutical Sciences, Kumamoto University, Oe-honmachi 5-1, Kumamoto 862-0973, Japan;4. University of Colorado Cancer Center, Aurora, CO 80045, United States |