Novel thiol derivative, method for producing the same and use thereof
CA 2483515 A1 · Owner: Takeda Pharmaceutical Company Limited · Inventors: Nishiguchi, Atsuko; Takizawa, Masayuki; Ikemoto, Tomomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel thiol derivative that has a matrix metalloprotease inhibition activity and is useful as a drug, especially a therapeutic agent for arthrosis deformans and articular rheumatism. In particular a compound of the formula: , I wherein the ring A is a substituted or unsubstituted aromatic heterocycle; the ring B is a substituted or unsubstituted homocycle or heterocycle; R1 is a hydrogen atom, a substituted or unsubstituted hydrocarbon group, an acyl group, a substituted or unsubstituted heterocyclic group or SR2 (R2 is a hydrogen atom, a substituted or unsubstituted hydrocarbon group an , acyl group or a substituted or unsubstituted heterocyclic group); X is a substituted or …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2025.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.