Patent ID: 7462641

Claim:
A crystalline form of anhydrous form 1 of (2S,4S)-4-fluoro-1-[4-fluoro-β-(4-fluorophenyl)-L-phenylalanyl]-2-pyrrolidinecarbonitrile p-toluenesulfonic acid salt characterized by a powder x-ray diffraction pattern comprising at least one of the following peaks: d-spacing Two theta (deg)* (angstroms) 6.1 ± 0.2 14.4 ± 0.5 6.4 ± 0.2 13.9 ± 0.5 7.7 ± 0.2 11.5 ± 0.3 22.2 ± 0.2 4.0 ± 0.1 24.7 ± 0.2 3.6 ± 0.1 *Using copper K-alpha 1 radiation.