N-methanesulfonic acid derivatives of 3-0- demethylistamycin b and production thereof
CA 1188308 A · Owner: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai · Inventors: Umezawa, Hamao; Kondo, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N-Methanesulfonic acid derivatives of 3-0demethylistamycin B and production thereof ABSTRACT OF THE DISCLOSURE, As new semi-synthetic antibiotic derivative are provided N-methanesulfonic acid derivatives of 3-0demethylistamycin B which are less toxic than the parent 3-0-demethylistamycin B and retain usefully high antibacterial activity of the parent antibiotic. The new derivatives are produced by a method of N-sulfomethylation where 3-0-demethylistamycin B is reacted with an aldehyde such as paraformaldehyde and sulfurous acid or sulfite reagent.
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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
- Granted June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.