| abstract |
There is provided EtO 2 C—CH 2 —(R)Cgl—Aze—Pab—OH, or a pharmaceutically-acceptable salt thereof, in a form which is substantially crystalline. It has been found that crystalline forms of EtO 2 C—CH 2 —(R)Cgl—Aze—Pab—OH have a high chemical and solid state stability when compared to amorphous forms of the compound. |