发明名称 |
Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations |
摘要 |
Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin delta and rifaximin epsilon useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization process carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by addition of water at a determinate temperature and for a determinate period of time, followed by a drying carried out under controlled conditions until reaching a settled water content in the end product, are the object of the invention.
|
申请公布号 |
US8518949(B2) |
申请公布日期 |
2013.08.27 |
申请号 |
US201213488345 |
申请日期 |
2012.06.04 |
申请人 |
VISCOMI GIUSEPPE CLAUDIO;CAMPANA MANUELA;CONFORTINI DONATELLA;BARBANTI MARIA MIRIAM;BRAGA DARIO;ALFA WASSERMANN S.P.A. |
发明人 |
VISCOMI GIUSEPPE CLAUDIO;CAMPANA MANUELA;CONFORTINI DONATELLA;BARBANTI MARIA MIRIAM;BRAGA DARIO |
分类号 |
C07D498/22;A61K31/395 |
主分类号 |
C07D498/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|