Eutectic form A of Elagolix and pyrimethamine, preparation method therefor and use thereof
Disclosed are eutectic form A of Elagolix and pyrimethamine, a preparation method therefor and a use thereof. Using Cu-Kα radiation, eutectic form A has characteristic peaks represented by a 2θ degree at 8.1±0.2°, 12.2±0.2°, 13.3±0.2° and 21.1±0.2° in an X-ray powder diffraction. Eutectic form A has a high purity, a good light radiation stability, a high temperature stability, a high humidity stability and an accelerated stability, is easy to store, and has a slow moisture absorption under the condition of relatively low humidity, wherein the weight gain of eutectic form A by moisture absorption is not more than 1.08% when the relative humidity increases from 0 to 60% RH. Production conditions for eutectic form A are easy to control, same has a simple preparation process and a stable quality, and is easy to industrially produce on a large-scale.
1. An eutectic form A of Elagolix and pyrimethamine, wherein an X-ray powder diffraction of the eutectic form A using Cu-Kα radiation has characteristic peaks at 2θ angles of 8.1±0.2°, 12.2±0.2°, 13.3±0.2° and 21.1±0.2°.
2. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the X-ray powder diffraction of the eutectic form A using Cu-Kα radiation also has a characteristic peak at 2θ angle of 24.4±0.2°.
3. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the X-ray powder diffraction of the eutectic form A using Cu-Kα radiation also has characteristic peaks at 20 angles of 16.2±0.2° and 22.0±0.2°.
4. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the X-ray powder diffraction of the eutectic form A using Cu-Kα radiation also has characteristic peaks at 20 angles of 28.1±0.2° and 31.7±0.2°.
5. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the eutectic form A has characteristic peaks in its X-ray powder diffraction pattern comprising:
2θ (±0.2°)
d (Å)
I %
8.1
10.9
9.6
12.2
7.3
7
13.3
6.7
37.3
21.1
4.2
47.3
22.0
4.0
4.1
24.4
3.6
86.4
31.7
2.8
100.
6. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the eutectic form A has characteristic peaks in its X-ray powder diffraction pattern comprising:
2θ (±0.2°)
d (Å)
I %
8.074
10.9408
9.6
12.176
7.2631
7
13.26
6.6715
37.3
15.838
5.5909
8
16.157
5.4813
9.3
21.138
4.1996
47.3
22.017
4.0338
4.1
23.9
3.72
11.3
24.44
3.6392
86.4
26.58
3.3508
24
27.361
3.2569
8.9
28.08
3.1752
20.5
31.699
2.8204
100
32.163
2.7807
14.4
33.143
2.7007
5.1
34.539
2.5947
8.6
37.223
2.4136
8.6
42.52
2.1243
5.5.
7. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the eutectic form A has an X-ray powder diffraction pattern substantially as shown in FIG. 7 A .
8. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein a differential scanning calorimetry curve of the eutectic form A has a first endothermic peak and a second endothermic peak, wherein the first endothermic peak is at a temperature of 69.49±2° C., and the second endothermic peak is at a temperature of 204.78±2° C.
9. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the eutectic form A has a differential scanning calorimetry curve substantially as shown in FIG. 8 .
10. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein a thermo gravimetric analysis curve of the eutectic form A has a thermal weight loss of less than 6.2% before 193° C.
11. The eutectic form A of Elagolix and pyrimethamine according to claim 1 , wherein the eutectic form A has a thermo gravimetric analysis curve substantially as shown in FIG. 9 .
12. A method for preparing the eutectic form A of Elagolix and pyrimethamine according to claim 1 , the method comprising: dissolving a raw drug of Elagolix sodium in an organic solvent, adding a concentrated hydrochloric acid thereto, adding an aqueous solution of pyrimethamine, stirring, filtering, and drying to obtain an eutectic.
13. The method according to claim 12 , wherein a molar ratio of the raw drug of Elagolix sodium to pyrimethamine is in a range of from 1.0:1.1 to 1.0:1.5.
14. A pharmaceutical composition, comprising the eutectic form A of Elagolix and pyrimethamine according to claim 1 and a pharmaceutically acceptable excipient.
15. A method for the treatment of a sex hormone-related disease state, a gonadotropin releasing hormone-related disease state, infertility, lupus erythematosus, irritable bowel syndrome, premenstrual syndrome, hirsutism, short stature, or sleep disorder in an individual in need thereof, the method comprising administering to the individual a pharmaceutically effective amount of the eutectic form A according to claim 1 , or a pharmaceutical composition comprising said eutectic form A and a pharmaceutically acceptable excipient.
16. The method according to claim 15 , wherein the sex hormone-related disease state is cancer, benign prostatic hypertrophy, or uterine fibroids.
17. The method according to claim 15 , wherein the sex hormone-related disease state is endometriosis, polycystic ovary disease, uterine leiomyoma, or precocious puberty.
18. The method according to claim 16 , wherein the cancer is prostate cancer, uterine cancer, breast cancer, or pituitary gonadotropic cell adenoma.