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US 2023/0146674 A1Published application
Highly pure phentolamine mesylate and methods for making same
AssigneeOcuphire Pharma, Inc.
InventorDaniela Carmen ONICIU
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Abstract
This invention provides methods for synthesizing phentolamine mesylate from phentolamine and methanesulfonic acid in the presence of acetone and water. The methods of the present invention provide highly pure phentolamine mesylate. The invention also provides highly pure phentolamine mesylate.
Claims9
-50. (canceled)
Phentolamine mesylate comprising 0% water by weight to about 6% water by weight of the phentolamine mesylate and comprising less than 0.3% of another impurity by weight of the phentolamine mesylate.
-93. (canceled)
Dependencies are inferred from the claim text.