Valiolamine derivatives and production thereof
CA 1289904 C · Owner: Takeda Chemical Industries, Ltd. · Inventors: Kameda, Yukihiko; Horii, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel valiolamine derivative of the formula (I): ( I ), where R stands for hydrogen or .beta.-D-glucopyranosyl group is useful for a starting material of valiolamine which can be converted to more potent .alpha.-glucosidase inhibiting compounds. The valiolamine derivative is obtained by cultivating Streptomyces hygroscopics in a culture medium and recovering the valiolamine derivative produced and accumulated from the culture broth.
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
- Granted October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
- 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.