Crystalline forms of tiotropium bromide

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The Boehringer Ingelheim International Gmbh patent solves the following problem:

Tiotropium bromide is known from European Patent Application EP 418 716 A1 and the following chemical structure:

Our analysis of this patent is as follows:

Boehringer Ingelheim International Gmbh’s patent US 7879871 B2 deals with Crystalline forms of tiotropium bromide.
The invention relates to a new crystalline form of tiotropium bromide, processes for preparing them and their use in preparing a pharmaceutical composition for the treatment of respiratory complaints, especially for the treatment of COPD (chronic obstructive pulmonary disease) and asthma.

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