A crystalline form of the compound and its preparation method -oxiracetam

The present invention relates to a crystalline form of the compound and a preparation method oxiracetam, it belongs to the technical field of medicine. The crystalline form of X- ray powder diffraction at 2θ -oxiracetam compound was 5.2 ± 0.2 °, 11.5 ± 0.2 °, 13.6 ± 0.2 °, 15.8 ± 0.2 °, 17.5 ± 0.2 °, 19.1 ± 0.2 °, 20.8 ± 0.2 ° at the characteristic peaks. The crystalline form -oxiracetam compound having high bioavailability, good stability, long-term placement of related substances does not increase, without deteriorating excellent clarity properties, more suitable as a drug for the manufacture and storage of pharmaceutical preparations.