%0 Journal Article %T Separation of Cyclic Dipeptides (Diketopiperazines) from Their Corresponding Linear Dipeptides by RP-HPLC and Method Validation %A Mareike Perzborn %A Christoph Syldatk %A Jens Rudat %J Chromatography Research International %D 2013 %I %R 10.1155/2013/310269 %U http://dx.doi.org/10.1155/2013/310269