The Cytosporones, New Octaketide Antibiotics Isolated from an Endophytic Fungus
作者:Sean F. Brady、Melissa M. Wagenaar、Maya P. Singh、Jeff E. Janso、Jon Clardy
DOI:10.1021/ol006680s
日期:2000.12.1
Organic extracts from cultures of endophytic fungi collected in the Guanacaste Conservation Area of Costa Rica were screened for antibiotic activity. Two endophytes CR200 (Cytospora sp,) and CR146 (Diaporthe sp,) were found to have potent antibiotic activity. Bioassay guided fractionation of the extracts from these fungi led to the identification of cytosporones D and E, antibacterial active trihydroxybenzene lactones, and three related but inactive metabolites, The five new octaketides were characterized using X-ray crystallography and NMR.