| 摘要 |
The present invention is concerned with a crystalline, polymorphic form of a compound of formula (I) characterised by a powder X-ray diffraction pattern obtained using copper K-alpha, radiati on (.gamma.= 0.15046 nm) which shows main peaks at 9.28, 10.38, 11.37, 12.40, 16.84, 17.46, 17.53, 17.78, 17.98, 19.48. 20.70, 21.29, 21.45, 22.21, 22.64, 23.08, 25.20 and 25.79. The invention also relates to processes for the preparation of said form, to pharmaceutical compositions containing same and to its use in medicine, particularly the treatment of conditions for which an agonist of 5 - IIT~ receptors is indicated, for example, migraine,
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