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US 4,902,687 AGranted
Excitatory amino acid receptor antagonists
AssigneeEli Lilly and Company
InventorPaul L. Ornstein
Life of this patent
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Abstract
The present invention provides novel piperazine derivatives useful as excitatory amino acid receptor antagonists and in treating a variety of associated nervous system disorders.
Claims18
A compound of the formula ##STR7## wherein:
- R.sub.1 is ##STR8## R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl, or phenyl-substituted C.sub.1 -C.sub.4 alkyl;
- M is 2 or 3;
- each R.sup.3 is independently C.sub.1 -C.sub.16 alkoxy, phenyl-substituted C.sub.1 -C.sub.4 alkoxy, or an oral ester forming group;
- each R.sup.4 is independently hydrogen, C.sub.1 -C.sub.16 alkyl, phenyl-substituted C.sub.1 -C.sub.4 alkyl, or phenyl;
- or
- a pharmaceutically acceptable salt thereof.
3 more elements
Dependencies are inferred from the claim text.