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US 5,212,176 AGranted
R(+)-terazosin
AssigneeAbbott Laboratories
InventorsJohn J. Kyncl, Bruce W. Horrom
Life of this patent
Estimating the term…
Abstract
R(+)-2-[4-[(tetrahydro-2-furanyl)carbonyl]-1-piperazinyl]-6,7-dimethoxy-4-q uinazolinamine hydrochloride or a pharmaceutically acceptable salt or hydratet hereof (terazosin), substantially free of the S(-)-enantiomer.
Claims6
The compound having the name R(+)-2-(4-((tetrahydro-2-furanyl)carbonyl)piperazinyl)-6,7-dimethoxy-4-qui nazolinamine hydrochloride dihydrate having an optical rotation [.alpha]sub.D.sup.28.5.degree. C. (C=1, water) of 23.9.degree. or greater.
Dependencies are inferred from the claim text.