Dioxolides, a novel class of secondary metabolites were detected by a HPLC-diode array screening technique in the culture filtrate of Streptomyces tendae Tu 4042. The compounds show no biological activity against Gram-positive and Gram-negative bacteria, yeasts and fungi. Besides dioxolides, which consist of an unusual substituted dioxolane ring, anhydroshikimate and para-hydrobenzamide were detected by this technique. Both compounds were not yet described as natural products.
Blum, S., Groth, I., Rohr, J., & Fiedler, H. P. (1996). Biosynthetic capacities of actinomycetes. 5. Dioxolides, novel secondary metabolites from Streptomyces tendae. Journal of Basic Microbiology, 36(1), 19–25. https://doi.org/10.1002/jobm.3620360105