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Last Updated: December 12, 2025

Claims for Patent: 4,011,258

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Summary for Patent: 4,011,258

Title:	Orally active bronchospasmolytic compounds
Abstract:	Novel compounds are disclosed having useful activity as bronchodilators of improved longevity of action and reduced incidence of side effects. These compounds are described by the formula: ##STR1## wherein R1 is a member of the class consisting of tertiary butyl and cyclobutyl, and R2 is a hydrogen or 2 to 5 carbon atom acyl radical, and pharmaceutically acceptable salts thereof. The activity of these compounds is compared to previously known bronchodilators such as 1-(3', 5'-dihydroxyphenyl)-2-(isopropylamino)-ethanol, having the common name orciprenaline, and 1-(3', 4'-dihydroxyphenyl-2-isopropylamino-ethanol, having the common name isoprenaline.
Inventor(s):	Kjell Ingvar Leopold Wetterlin, Leif Ake Svensson
Assignee:	Draco AB
Application Number:	US05/593,424
Patent Claims:

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