Simon P. B. Ovenden, Gian Sberna, R. Murray Tait, Howard G. Wildman, Rupal Patel, Bin Li, Kevin Steffy, Natalie Nguyen, Barbara M. Meurer-Grimes,
A diketopiperazine dimer from a marine-derived isolate of Aspergillus niger. Journal of Natural Products. ,vol. 67, pp. 2093- 2095 ,(2004) ,
10.1021/NP0497494