a
Key Laboratory of Chemistry of Northwestern Plant Resources, CAS/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China
E-mail: hdqiu@licp.cas.cn
b
Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
E-mail: ihara@kumamoto-u.ac.jp
;
Fax: +81-96-342-3662
;
Tel: +81-96-342-3661
c
Kumamoto Institute for Photo-Electro Organics (Phoenics), Kumamoto 862-0901, Japan