EP Patent

EP0342675A2 — Novel quinolonecarboxylic acid derivatives

Assigned to Chugai Pharmaceutical Co Ltd · Expires 1989-11-23 · 36y expired

What this patent protects

Novel compounds of the present invention are repre­sented by the general formula (I) wherein R₁ is hydrogen atom or amino, R₂ is fluorine atom or methoxy, R₃ is hydrogen atom or a lower alkyl having 1 to 3 carbon atoms, and n is 0 or 1. The compounds of the general formula …

USPTO Abstract

Novel compounds of the present invention are repre­sented by the general formula (I) wherein R₁ is hydrogen atom or amino, R₂ is fluorine atom or methoxy, R₃ is hydrogen atom or a lower alkyl having 1 to 3 carbon atoms, and n is 0 or 1. The compounds of the general formula (1) exhibit higher antibacterial activity with fewer side-effects than known quinolone antibiotics such as ofloxacin and norfloxacin. Further, the compounds having the general formula (1) have reduced phototoxicity which normally accompanies 6,8-difluoroquinoline antibiotics.

Drugs covered by this patent

Patent Metadata

Patent number
EP0342675A2
Jurisdiction
EP
Classification
—
Expires
1989-11-23
Drug substance claim
No
Drug product claim
No
Assignee
Chugai Pharmaceutical Co Ltd
Source
FDA Orange Book + USPTO grounding via Google Patents

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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