| abstract |
Compounds of formula I. wherein A is a direct bond or an optionally substituted alkylene radical, X is -0- or ―N (R 16 ) -, R 2 is a monovalent radical, R 5 or R 3 is hydroxyl and R 1 , R 4 , R B , R 7 and R 8 are hydrogen or monovalent radicals, are effective stabilizers for photographic dyes and their precursors. Above all, they increase the lightfastness of the developed color images. |