Patent ID: 7812100

Claim:
A compound of formula (I) or (II) wherein A is a group of formula A, B or O capable of forming a stable free nitroxyl radical A• which is bound via its oxygen atom to the carbon atom wherein R 8 is hydrogen, C 1 -C 18 alkyl which is uninterrupted or interrupted by one or more oxygen atoms, cyanoethyl, benzoyl, glycidyl, a monovalent radical of an aliphatic carboxylic acid having 2 to 18 carbon atoms, of a cycloaliphatic carboxylic acid having 7 to 15 carbon atoms, or an α,β-unsaturated carboxylic acid having 3 to 5 carbon atoms or of an aromatic carboxylic acid having 7 to 15 carbon atoms; R 9 is C 1 -C 18 alkyl, C 5 -C 7 cycloalkyl, C 2 -C 8 alkenyl unsubstituted or substituted by a cyano, carbonyl or carbamide group, or is glycidyl, a group of the formula —CH 2 CH(OH)—Z or of the formula —CO—Z or —CONH—Z wherein Z is hydrogen, methyl or phenyl; R 10 is C 1 -C 12 alkyl, C 5 -C 7 cycloalkyl, C 7 -C 8 aralkyl, C 2 -C 18 alkanoyl, C 3 -C 5 alkenoyl or benzoyl; G 1 and G 3 are methyl and G 2 and G 4 are ethyl or propyl or G 1 and G 2 are methyl and G 3 and G 4 are ethyl or propyl; G 5 is hydrogen or C 1 -C 4 alkyl, R 1 and R 2 independently of one another are hydrogen, C 1 -C 18 -alkyl, C 3 -C 8 cycloalkyl or phenyl which are unsubstituted or substituted by NO 2 , halogen, amino, hydroxy, cyano, carboxy, C 1 -C 4 alkoxy, C 1 -C 4 alkylthio, C 1 -C 4 alkylamino or di(C 1 -C 4 alkyl)amino; R 3 , R 4 and R 5 independently of one another are hydrogen or C 1 -C 18 alkyl or phenyl; or R 3 and R 5 together with the linking group C═C form a 5 to 12 membered ring; R 6 is hydrogen or C 1 -C 18 alkyl or phenyl; X is O, NH or NR 7 , wherein R 7 is C 1 -C 18 alkyl, C 3 -C 8 cycloalkyl or phenyl; Y is a direct bond, C 1 -C 30 alkylene or C 6 -C 12 arylene.