| the isolation of citric acid derivatives from aspergillus niger. | a strain of aspergillus niger was cultured from a soil sample collected from five islands provincial park, nova scotia, canada. extraction of fermentation cultures revealed the production of significant levels of dimethyl citrate (1) and trimethyl citrate (2), as well as a small amount of dimethyl oxalate (3). this appears to be the first report of the production of methylated citric acid derivatives in a filamentous fungus. | 2010 | 20345375 |