Inhibition of TNF-alpha promoter activity and synthesis by A11-99-1, a new cyclopentenone from the ascomycete Mollisia melaleuca
In a search for inhibitors of the inducible tumor necrosis factor-alpha (TNF-alpha) promoter activity and synthesis, a new chlorinated cyclopentenone was isolated from fermentations of the ascomycete Mollisia melaleuca. The structure was determined by a combination of spectroscopic techniques. The compound blocked the inducible human TNF-alpha promoter activity and synthesis with IC50-values of 2.