Patent ID: 7459568

Claim:
The alpha crystalline form of the compound of formula (I): wherein the compound has a water content of from 22 to 24% and exhibits essentially the following powder X-ray diffraction diagram expressed in terms of ray position (Bragg's angle 2 theta, expressed in degrees), ray height (expressed in counts), ray area (expressed in counts×degrees), ray width at half-height (“FWHM”, expressed in degrees) and interplanar distance d (expressed in Å): Surface Angle 2 theta Height (counts × FWHM Interplanar Ray no. (degrees) (counts) degrees) (degrees) distance (Å) 1 7.6 4527 448 0.1004 11.649 2 8.0 1438 142 0.1004 11.069 3 8.3 3522 349 0.1004 10.642 4 8.6 11347 1123 0.1004 10.272 5 8.9 7332 726 0.1004 9.889 6 11.0 1047 104 0.1004 8.072 7 11.3 1655 164 0.1004 7.840 8 12.0 2186 216 0.1004 7.355 9 13.2 2887 381 0.1338 6.703 10 13.5 1705 169 0.1004 6.557 11 14.1 154 30 0.2007 6.275 12 14.7 803 79 0.1004 6.035 13 14.9 1346 178 0.1338 5.942 14 15.8 1556 154 0.1004 5.613 15 16.0 3339 441 0.1338 5.527 16 16.7 1845 183 0.1004 5.308 17 17.3 2835 281 0.1004 5.127 18 17.6 1252 124 0.1004 5.049 19 18.0 2183 216 0.1004 4.939 20 19.2 2303 228 0.1004 4.622 21 19.8 1298 128 0.1004 4.475 22 20.3 788 78 0.1004 4.373 23 20.6 1039 103 0.1004 4.317 24 21.1 882 116 0.1338 4.211 25 21.7 390 38 0.1004 4.103 26 22.3 1919 253 0.1338 3.990 27 22.7 1805 179 0.1004 3.923 28 23.0 4043 467 0.1171 3.861 29 23.5 650 86 0.1338 3.792 30 24.0 8677 1002 0.1171 3.711 31 24.7 229 30 0.1338 3.600 32 25.1 1246 164 0.1338 3.543 33 25.6 1659 219 0.1338 3.473 34 25.9 1773 175 0.1004 3.442 35 26.3 695 69 0.1004 3.385 36 26.6 401 46 0.1171 3.355 37 27.0 2800 370 0.1338 3.300 38 27.6 1415 140 0.1004 3.230 39 28.0 3250 429 0.1338 3.186 40 28.4 1513 250 0.1673 3.144 41 29.1 1456 144 0.1004 3.068 42 29.6 1943 192 0.1004 3.022 43 30.1 3637 540 0.1506 2.967 44 30.5 707 117 0.1673 2.929 45 30.9 596 59 0.1004 2.897 46 31.8 577 76 0.1338 2.816 47 32.0 1080 107 0.1004 2.796 48 32.5 512 51 0.1004 2.756 49 32.9 1268 167 0.1338 2.726 50 33.4 1180 117 0.1004 2.685.