| abstract |
The present invention relates to a crystal form I of Dapagliflozin which is a medicine for treating type II diabetes, and a preparation method therefor. The crystal form I is characterized in that an x-ray powder diffraction pattern has characteristic peaks when 2theta values are 15.8°±0.2°, 19.8°±0.2° and 28.7°±0.2°. Compared with the prior art, the crystal form I has better stability, facilitates the long-term storage of a medicine, and avoids crystal transformation during medicine development and storage. The preparation method is simple, facilitates cost control in technological production, and has very high economic value. |