CPC C07D 471/04 (2013.01) [C07B 2200/13 (2013.01)] | 16 Claims |
1. Crystal form A of a compound of formula (I) having an X-ray powder diffraction (XRPD) pattern with characteristic diffraction peaks at 2θ angles: 8.40±0.2°, 13.46±0.2°, and 14.13±0.2°,
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