CA2189355A1 — Imidazoquinazoline derivatives
Assigned to KH Neochem Co Ltd · Expires 1996-09-06 · 30y expired
What this patent protects
Imidazoquinazoline derivatives represented by general formula (I) or pharmacologically acceptable salts thereof, wherein R1 represents hydrogen, optionally substituted lower alkyl, etc.; R2 and R3 are the same or different and each represents hydrogen, optionally substituted lowe…
USPTO Abstract
Imidazoquinazoline derivatives represented by general formula (I) or pharmacologically acceptable salts thereof, wherein R1 represents hydrogen, optionally substituted lower alkyl, etc.; R2 and R3 are the same or different and each represents hydrogen, optionally substituted lower alkyl, optionally substituted aralkyl, optionally substituted aryl, etc., or R2 and R3 together form an optionally substituted nitrogenous heterocycle; R4 represents hydrogen or optionally substituted lower alkyl; X represents O or S; Y represents a single bond or O; and n is 0, 1, 2 or 3.
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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