Heterocyclic derivatives
CA 1300807 C · Owner: Wellcome Foundation Limited (The) · Inventors: Kelley, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a compound of formula (I): wherein R1 is hydrogen, C1-4 alkyl, acetyl or formyl; R2 and R3 are the same or different and are hydrogen or C1-4 alkyl; R2 is NR11R12; R11, R12, R5 and R6 are the same or different and are hydrogen C1-4, alkyl or C1-12 acyl; R7, R8, R9 and R10 are the same or different and are hydrogen, halo, C1-4 haloalkyl, C1-4 alkyl and C1-4 alkoxy; and n is 2, 3, 4 or 5; m is o or an integer from 1 to 6; or a salt thereof methods for the preparation of the compounds of the formula (I) intermediates in their preparations, pharmaceutical formulations containing them, and their use in the treatment of tumours.
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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.