| 摘要 |
<p> Provided are a new crystalline form of levonorgestrel, which is useful as an emergency contraception, etc., a manufacturing method for the same, and a drug composition. The powder X-ray diffraction spectrum of thisβcrystalline polymorph of levonorgestrel has diffraction peaks where the diffraction angle (2θ) is an angle of 2θ=13.9°±0.2°, 14.5°±0.2°, 21.3°±0.2°, 24.9°±0.2°, and 28.2°±0.2°, and has essentially no diffraction peak at the angle 2θ=18.6°±0.2°.</p> |
