Crystal form of fused ring derivative, and preparation method therefor and use thereof
AssigneeShanghai Yingli Pharmaceutical Co., Ltd
InventorsZusheng XU, Yangtong LOU, Youhai TANG
Life of this patent
Estimating the term…
Abstract
Disclosed are a crystal form of a fused ring derivative, and a preparation method therefor and the use thereof. The crystal form I of the compound as represented by formula A has high purity and good stability, and is non-hygroscopic. In addition, the crystallization solvent used in the preparation method therefor has the advantage of low residue and is suitable for industrial production.
Claims12
A crystal form I of a compound as represented by formula A having an X-ray Powder Diffraction pattern comprising diffraction peaks at angles 2θ of 8.3±0.2°, 12.8±0.2°, 13.4±0.2°, 17.5±0.2°, 17.9±0.2° and 23.3±0.2°, the X-ray Powder Diffraction is measured by Cu K-alpha radiation;
Dependencies are inferred from the claim text.