| 摘要 |
<p>A crystal of (1S,2S,3R,4S,5R,8R,9S,10R,13S)-4-acetoxy-2-benzoyloxy-9,10-Ä(1S)-2-(dimethylamino)ethylidenedioxyÜ-5,20-epoxy-1-hydroxytax-11-en-13- yl (2R,3S)-3-(tert-butoxycarbonylamino)-3-(3-fluoro-2-pyridyl)-2-hydroxypropionate, which has characteristic peaks at diffraction angles (2 &thetas; ) of 6.2 DEG , 10.3 DEG , 10.7 DEG , 11.4 DEG , and 12.0 DEG in a powder X-ray diffraction pattern, and a method for preparing the aforementioned crystal, which comprises the step of performing crystallization by using an organic solvent selected from the group consisting of a ketone type solvent, a nitrile type solvent, and a mixture thereof, or a mixture of said organic solvent and water.</p> |
