Patents Examined by Emily Bernhaudt
  • Piperazinylalkylpiperazinedione compounds
    Patent number: 4943577
    Abstract: The invention relates to compounds of formula I ##STR1## in which R.sub.1 and R.sub.2 form together and with the piperazine-2,6-dione radical to which they are attached a hexahydropyrazino-.beta.-cabbolinedione radical,R.sub.3 denotes a pyrimidinyl radical or a phenyl radical optionally substituted by an alkyl radical of 1 to 4 carbon atoms or a trifluoromethyl radical,n is an integer of 2 to 4, inclusive.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: July 24, 1990
    Assignee: Adir Et Cie
    Inventors: Gilbert Lavielle, Jean C. Poignant