abstract |
Disclosed is Crystal Form S4 of a fumarate salt of compound (I) represented by the following structural formula: The molar ratio between compound (I) and fumaric acid is 1.0:1:0. Crystal Form S4, characterized by an X-ray powder diffraction pattern which comprises peaks at 6.6DEG, 9.8DEG, 16.3DEG, 21.1DEG, 28.7DEG, and 30.2DEG ± 0.2 in 2[theta]. |