1. Department
of Chemistry and Biochemistry, San Francisco State University, 1600 Holloway Avenue, San Francisco, California 94132, United States
2. Department
of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California, 95064, United States
3. Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan