Distamycin derivatives, process for preparing them, and their use as antitumor and antiviral agents
CA 2253652 A1 · Owner: Pesenti, Enrico · Inventors: Pesenti, Enrico; Beria, Italo; Caldarelli, Marina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound which is a distamycin derivative of formula (I) wherein n is 2, 3 , or 4; R0 is C1-C4 alkyl or C1-C3 haloalkyl; R1 and R2 which may be the same , or different, are each hydrogen C1-C4 alkyl optionally substituted by one or more fluorine atoms, or C1-C4 alkoxy; X is a halogen atom; B is selected from (A, B, C, D, E, F, G, H, I, J and K); wherein R3 R4, R5, R6, R7, R8, and R9, which may be the same or different are each hydrogen or C1-C4 alkyl, and m is 0, 1 or 2; or a pharmaceutically acceptable salt thereof. Such compounds are useful as antineoplastic and antiviral 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
- Filed April 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2019.
- 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.