CPC C07D 213/73 (2013.01) [A61P 27/00 (2018.01); C07B 2200/13 (2013.01)] | 14 Claims |
1. A crystal form A of a compound represented by formula (I), wherein the crystal form A has an X-ray powder diffraction pattern comprising characteristic diffraction peaks at the following 2θ angles: 7.03±0.20°, 16.36±0.20°, and 21.23±0.20°;
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