Studies on Polyoxins, Antifungal Antibiotics: Part V. Isolation and Characterization of Polyoxins C, D, E, F, G, H and I

Seven additional components, polyoxins C, D, E, F, G, H and I were isolated from polyoxin complex. They have molecular formulae corresponding to C11H15N3O8, C17H23N5O14, C17H23N5O13, C23H30N6O15, C17H25N5O12, C23H32N6O13 and C19H24N4O12, respectively. These polyoxins except inactive polyoxins C and I were highly active against various kinds of phytopathogenic fungi. The close structural similarity among them including polyoxins A and B is also discussed.