Phytocassane is a kind of phytoalexins produced in suspension-cultured rice cells by treatment with a mycelial extract of the potato pathogenic fungus phytophthora infestans. In this paper, the electronic structures and structure-activity relationships of phytocas-sane A-E were studied by using quantum chemical calculations (AM1 method) . From the results of correlation analysis, the active site, action mode and the relationships between the structure...
