Title:
ベツリン酸製造の改良方法
Document Type and Number:
Japanese Patent JP2005517020
Kind Code:
A
Abstract:
The invention relates to an improved method for obtaining highly pure, crystalline betulinic acid from a methanolic extract of ground plane bark and/or plane rind. The invention also relates to a highly pure, crystalline betulinic acid, which is solvated with an equivalent of ethanol.
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Inventors:
Sawtell Marx
Application Number:
JP2003566030A
Publication Date:
June 09, 2005
Filing Date:
January 30, 2003
Export Citation:
Assignee:
Boehringer Ingelheim Pharma Gesellshaft Mitt Beschlenktel Haftung Und Company Comandito Gesellshaft
International Classes:
A61K31/56; A61K36/18; A61P35/00; C07J53/00; C07J63/00; (IPC1-7): C07J63/00; A61P35/00
Foreign References:
| WO2001010885A2 | 2001-02-15 |
Attorney, Agent or Firm:
Sadao Kumakura
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama