1. Part I. M. Maruyama, A. Terahara, Y. Itagaki and K. Nakanishi, Tetrahedron Letters. this issue.
2. Part V. M. C. Woods, I. Miura, Y. Nakadaira, A. Terahara, M. Maruyama and K. Nakanishi, Tetrahedron Letters, this issue.
3. Part IV. M. Maruyama, A. Terahara, Y. Nakadaira, M. C. Woods, Y. Takagi and K. Nakanishi, Tetrahedron Letters, this issue.