主权项 |
1. A crystalline polymorph of the compound of formula Iwhich has a powder X-ray diffraction pattern comprising at least three d values selected from the group consisting of 10.45±0.2, 7.45±0.2, 6.71±0.2, 6.31±0.2, 5.99±0.2, 5.42±0.2, 5.23±0.2, 4.78±0.2, 4.60±0.2, 4.53±0.2, 4.33±0.2, 4.14±0.2, 3.97±0.2, 3.86±0.2, 3.73±0.2, 3.62±0.2, 3.49±0.2, 3.37±0.2, 3.30±0.2, 3.23±0.2, 3.19±0.2, 3.14±0.2, 3.06±0.2 and 3.00±0.2 and which has no peak in the powder X-ray diffraction pattern at d=16.58±0.2 and d=16.84±0.2. |