1. Laboratory
of Aquatic Natural Products Chemistry, Graduate School of Agricultural
and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
2. Chemical Genomics Reserach Group, RIKEN Center for Sustainable Resource Science, Wako Saitama 351-0198, Japan
3. Chemical Genetics Laboratory, RIKEN, Wako
Saitama 351-0198, Japan