1. Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
2. DPS Inc., 1-39-2215 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan
3. Laboratory of Organic Chemistry, Daiichi University of Pharmacy, 22-1 Tamagawa-cho, Minami-ku, Fukuoka 815-8511, Japan