| abstract |
The present invention particularly relates to compounds of formula (I): In the above formula One or two radicals of the radicals R 1 are independently of each other C 1 -C 20 alkyloxy or C 3 -C 12 cycloalkyloxy and the remaining radicals R 1 are independently of each other hydrogen, C 1 -C 20 alkyl or C 3- C 12 cycloalkyl; The radicals R 0 and R 2 are independently of each other hydrogen, C 1 -C 20 alkyl, C 3 -C 12 cycloalkyl or a group of the formula (II-a); [Where R 3 is hydrogen, C 1 -C 20 alkyl, C 3 -C 12 cycloalkyl, C 1 -C 20 alkyloxy or C 3 -C 12 cycloalkyloxy] Y is C 2 -C 12 alkylene; m is 0 or 1; n is 1, 2 or 3; when n is 1, X is hydrogen, C 1 -C 20 alkyl, C 3 -C 12 cycloalkyl or a group of formula (II-a); when n is 2, X is C 2 -C 12 alkylene; When n is 3, X is an N(Z-) 3 group, where Z is C 2 -C 12 alkylene. |