The present invention relates to a crystalline, .alpha.-polymorphic form of a compound of formula (I) and to processes for the preparation of, to intermediates used in the preparation of, to compositions containing and to uses of, the .alpha.-polymorphic form. ##STR1##
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 1](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-1.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 1")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 2](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-2.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 2")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 3](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-3.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 3")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 4](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-4.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 4")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 5](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-5.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 5")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 6](http://www.wikipatents.com/crystalline-polymorphic-form-of-sss-n-1-2-carboxy-3-n2-mesyllyslamino-propyl-1--cyclopentylcarbonyl-tyrosine/T/US6180665-6.jpg "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 - Page 6")
![Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 Drawing](http://www.wikipatents.com/us/6180665.png "Crystalline polymorphic form of (S,S,S)-N-(1-[2-carboxy-3 (N2-mesyllyslamino) propyl]-1- cyclopentylcarbonyl) tyrosine - US Patent 6180665 Drawing")
