Indole derivatives with antiviral activity
CA 2326166 A1 · Owner: Fujishita, Toshio · Inventors: Yoshinaga, Tomokazu; Fujishita, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds represented by formula (I), wherein R1 represents hydrogen lower , alkyl, optionally substituted arylsulfonyl etc.; R2 represents hydrogen, lower alkyl optionally substituted aralkyl, etc.; R3 R4, R5, and R6 each , independently represents hydrogen halogeno, lower trihaloalkyl, etc.; X represents hydroxy or optionally substituted amino; and Y represents COOR (R is hydrogen or an ester residue), optionally substituted aryl or optionally , substituted heteroaryl. They have an integrase inhibitory activity and are useful as an anti-HIV agent.
Read the whole patent
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 March 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.