EP0794178A1 — Quinazoline derivative
Assigned to Nippon Chemiphar Co Ltd · Expires 1997-09-10 · 29y expired
What this patent protects
The present invention provides a new compound which shows slow and continuous blood pressure reducing action and is useful as an antihypertensive agent. The invention resides in a quinazoline derivative of the following formula (I) and its pharmaceutically acceptable salt: …
USPTO Abstract
The present invention provides a new compound which shows slow and continuous blood pressure reducing action and is useful as an antihypertensive agent. The invention resides in a quinazoline derivative of the following formula (I) and its pharmaceutically acceptable salt: in which, each of R 1 and R 2 is H or an alkyl group of 1 to 6 carbon atoms, or R 1 and R 2 are combined to form an ethylene group; each of R 3 and R 4 is an alkyl group of 1 to 6 carbon atoms; R 5 is a hydrogen atom, a hydroxyl group, an alkyl group of 1 to 6 carbon atoms, or an alkoxy group of 1 to 6 carbon atoms; each of R 6 and R 7 is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms; and n is 2 or 3. The invention further resides in an antihypertensive agent containing the above compound.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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