Patent ID: 7951942
Filing Date: 2011-05-31
Classification: A61P,C07D

Abstract:
1. A crystal of the compound of formula (I): which is a γ-type crystal, an ε-type crystal, a η-type crystal or a θ-type crystal, said γ-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 7.2°, 8.1°, 15.1°, and 23.3°; said ε-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 8.3°, 11.1°, 12.8°, 16.1° and 24.5°; said η-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 9.7°, 12.2°, 18.5°, and 20.4°; and said θ-type crystal exhibiting peaks at diffraction angles (2θ) of at least 5.7°, 11.5°, and 13.9° or of at least 11.5°, 13.9°, 18.5°, 20.0° and 21.0° in the powder X-ray diffraction pattern.