CHEMISTRY LETTERS, pp. 409 - 412, 1984. The Chemical Society of Japan 1984 UNSATURATED HYDROXY FATTY ACIDS, THE SELF DEFENSIVE SUBSTANCES IN RICE PLANT AGAINST RICE BLAST DISEASE * Tadahiro KATO, Yoshihiro YAMAGUCHI, Takumi HIRANO, Toshiro YOKOYAMA, Tadao UYEHARA, Tsuneo NAMAI,+ Susumu YAMANAKA,"1" and Nobuyuki HARADA++ Department of Chemistry, Faculty of Science, Tohoku University, Sendai 980 ...