The following article from Medicinal Research Reviews, Tetraoxanes: Synthetic and medicinal chemistry perspective by Nitin Kumar, Ram Singh, Diwan S. Rawat, published online on 21 December 2009 in Wiley Online Library (http://www.wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief, Binghe Wang and Wiley Periodicals, Inc. The retraction has been agreed due to inappropriate citation of previously published work.