Piperazinediones as oxytocin receptor antagonists

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C514S255020, C544S121000, C544S385000

Reexamination Certificate

active

07550462

ABSTRACT:
Compounds of formula (I)wherein R1is 2-indanyl, R2is 1-methylpropyl, R3is a group selected from 2,6-dimethyl-3-pyridyl or 4,6-dimethyl-3-pyridyl, R4represents methyl and R5represents hydrogen or methyl or, R4and R5together with the nitrogen atom to which they are attached represent morpholino and pharmaceutically acceptable derivatives thereof are described, as are processes for their preparation, pharmaceutical compositions containing them and their use in medicine, particularly their use as oxytocin antagonists.

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