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Catechol derivatives

  • US 5,633,371 A
  • Filed: 09/15/1995
  • Issued: 05/27/1997
  • Est. Priority Date: 03/11/1986
  • Status: Expired due to Term
First Claim
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1. A compound of the formula ##STR24## wherein Ra is nitro or cyano, Rb is hydrogen or halogen, Rc'"'"' is a substituted or unsubstituted aromatic or partially unsaturated heterocyclic group attached via a carbon atom or an ester or ether derivative thereof which is hydrolyzable under physiological conditions or a pharmaceutically acceptable salt thereof.

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