The present invention relates to a novel group of compounds having antibiotic, antifungal and/or cytostatic properties, which are obtainable from myxobacteria, especially of the genus Sorangium , preferably Sorangium cellulosum . One representative of this group of compounds is currently named Disorazole Z and Disorazole Z-epoxide, respectively, with specific substituents and specifically unsaturated bonds to its cyclic core structure:
