GB9307527D0 — New venzamide derivatives,processes for the preparation thereof and pharmaceutical composition comprising the same
Assigned to Fujisawa Pharmaceutical Co Ltd · Expires 1993-06-02 · 33y expired
What this patent protects
A compound of the formula : <CHEM> wherein R<1> is hydrogen or lower alkyl, R<2> is hydrogen, lower alkyl, halo(lower)alkyl, halogen or lower alkoxy, R<3> and R<4> are each hydrogen, lower alkyl or taken together to form oxo, R<5> is …
USPTO Abstract
A compound of the formula : <CHEM> wherein R<1> is hydrogen or lower alkyl, R<2> is hydrogen, lower alkyl, halo(lower)alkyl, halogen or lower alkoxy, R<3> and R<4> are each hydrogen, lower alkyl or taken together to form oxo, R<5> is hydrogen, halogen, nitro, hydroxy, protected hydroxy, lower alkyl or lower alkoxy optionally substituted with lower alkylamino, R<6> is hydrogen, lower alkyl or acyl, A is <CHEM> in which the substituents R<7> to R<1><3> and the symbol Y have certain meanings, and pharmaceutically accetable salts thereof, and processes for preparing them, and pharmaceutical compositions comprising them as an active ingredient.
Drugs covered by this patent
- Samsca (TOLVAPTAN) · Otsuka
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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