US Patent 6852889 Antioxidant nitroxides and nitrones as therapeutic agents

The invention provides novel adamantane compounds having one of the following formulas:wherein:R1 and R3 are H, OH, alkyl, cycloalkyl, amino or aryl, and can be the same or different;R2 is H, NH2, alkyl, OH, COOH, amino, amide, or carbamate;R4-R8 are H, OH, NH2, alkyl, OH, COOH, ester, amino, amide, or alkyloxy, and can be the same or different;R9-R14 are H, alkyl, or phenyl, and can be the same or different;and wherein when any of R1-R8 is amino, the compounds are the free bases and their acid addition salts.