| abstract |
Novel compounds of formula (I) are described, wherein E corresponds to the formula (a) or to the formula (b) and the radicals R1, R2, R11, R22, R'22, R33, and R'33 are as defined in claim 1. Compounds of formula (I) are suitable for stabilising organic material, especially plastics materials, surface-coatings, cosmetic preparations, sun protection agents or photographic material, against damage by light, oxygen and/or heat. |