Derivatives of 6-aminooctahydroindolizinetriol
CA 2082820 C · Owner: Merrell Pharmaceuticals Inc. · Inventors: Liu, Paul S.; Kang, Mohinder S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Amide and ester derivatives of 5-amino-octahydro- 1,7,8-indolizinetriol are described herein. The compounds have the general formula:, (see formula I) wherein R is C1-10 alkanoyl; and R' and R" and R''' are independently hydrogen, C1-10 alkanoyl or benzoyl. The compounds are prepared from castanospermine by replacing the appropriate hydroxy function with an amino function while protecting the other hydroxy groups in the meantime. The compounds are useful as hexosaminidase inhibitors.
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 May 8, 1991 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2013.
- 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.