| abstract |
The invention relates to compounds according to formula I, wherein X, Y and Z are O, NH or N-alkyl, Sp, Sp ', Sp "may be identical or different and stand for -H, - (CH 2 ) n -, - (CH 2 ) n - C (= O) - (CH 2 ) o - or - (CH 2 ) n -C (= O) - (CH 2 ) o -X- (CH 2 ) p -, n, o, p, q stand for an integer independently selected from the range beginning with 0 and ending with 40 and A, A 'and A "are absorbed by a substituent of UV radiation and have a conjugated π-electron system of at least 4π electrons, where A, A 'and A''may in turn be substituted with one or more groups -Sp -X-CH 2 -C (= O) -CH 2 -OH and may be the same or different, and wherein A, A' and A "are at the positions omitted, where Sp, Sp 'or Sp''is H, preparations containing such compounds and their use. |