Amino acid derivatives
CA 1330613 C · Owner: Aishita, Hideki · Inventors: Kawamura, Masanori; Aishita, Hideki; Arai, Yoshinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula:, (wherein R1 is hydrogen or alkyl; R2 is an optionally substituted carbocyclic or heterocyclic ring: Z is hydrogen or a group -COR9, (R9 is alkyl or phenyl) , , , , in which R10 is hydrogen, halogen trihalomethyl, alkyl or, alkoxy, R11 and R12 are each hydrogen alkyl or phenyl, substituted by R10, or R11 and R12 together represent alkylene and p is 1 or 2; q is 1 to 4; A is phenyl or cycloalkyl optionally substituted by halogen trihalomethyl, alkyl or alkoxy; and m is zero and n is 1 to 4 or n is zero and m is 1 to 4; and non-toxic salts thereof have an, inhibitory effect on enkephalinase and are useful as analgesic, antianxiety and anticonvulsant agents.
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 July 5, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2011.
- 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.