15-09-2022 дата публикации
Номер: US20220289722A1
Принадлежит:
A crystal form of a pyrazin-2(1H)-one compound and a preparation method therefor. The present invention specifically related to a compound of formula (II) and a preparation method for a crystal form of the compound. 3. The hydrochloride salt as defined in claim 2 , wherein claim 2 , n is selected from 0.6 claim 2 , 0.7 claim 2 , 0.8 claim 2 , 0.9 claim 2 , 1 claim 2 , 1.1 claim 2 , 1.2 claim 2 , 1.3 claim 2 , 1.4 claim 2 , 1.5 claim 2 , 1.6 claim 2 , 1.7 claim 2 , 1.8 claim 2 , 1.9 and 2.4. The hydrochloride salt as defined in claim 3 , wherein n is selected from 0.9 claim 3 , 1 and 1.1.6. A crystal form C of the hydrochloride salt as defined in claim 3 , wherein the X-ray powder diffraction pattern thereof comprises characteristic diffraction peaks at the following 2θ angles: 5.24±0.20° claim 3 , 9.58 ±0.20° claim 3 , and 10.45±0.20°.7. The crystal form C as defined in claim 6 , wherein the X-ray powder diffraction pattern thereof comprises characteristic diffraction peaks at the following 2θ angles: 5.24±0.20° claim 6 , 9.58±0.20° claim 6 , 10.45±0.20° claim 6 , 14.26±0.20° claim 6 , 20.86±0.20° claim 6 , 24.99±0.20° claim 6 , 26.21±0.20° and 27.71±0.20°.8. The crystal form C as defined in claim 7 , wherein the X-ray powder diffraction pattern thereof comprises characteristic diffraction peaks at the following 2θ angles: 5.24° claim 7 , 8.45° claim 7 , 9.08° claim 7 , 9.58° claim 7 , 10.45° claim 7 , 11.49° claim 7 , 13.23° claim 7 , 14.02° claim 7 , 14.26° claim 7 , 15.18° claim 7 , 15.60° claim 7 , 16.35° claim 7 , 18.15° claim 7 , 18.74° claim 7 , 19.52° claim 7 , 19.94° claim 7 , 20.86° claim 7 , 21.65° claim 7 , 21.97° claim 7 , 22.50° claim 7 , 23.28° claim 7 , 23.64° claim 7 , 24.16° claim 7 , 24.99° claim 7 , 26.21° claim 7 , 26.98° claim 7 , 27.71° claim 7 , 28.52° claim 7 , 29.07° claim 7 , 29.43° claim 7 , 30.37° claim 7 , 31.72° claim 7 , 32.30° claim 7 , 33.11° claim 7 , 34.79° and 36.78°.9. The crystal form C as defined in claim 8 , wherein the X-ray ...
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