1) Presented in part at the 18 th Symposium on the chemistry of natural products (Kyoto 1974), T. Ueno, T. Nakashima, Y. Hayashi and H. Fukami, the Symposium Paper, 18, 369 (1974).
2) T. Ueno, Y. Hayashi, T. Nakashima, H. Fukami, S. Nishimura, K. Kohmoto and A. Sekiguchi, Phytopathology, 65, 82 (1975).