| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: present invention relates to use of compounds of formula Ia, Ib or Ic or cosmetically acceptable salts thereof as antioxidants, for preparing cosmetic compositions and for controlling pigmentation, particularly for clearing areas on the skin, to certain specific compounds of formula Ia, Ib or Ic or cosmetically acceptable salts thereof, a method of producing compounds of formula Ia, Ib or Ic, a cosmetic composition based on compounds of formula Ia, Ib or Ic and preparation method thereof or . In formulae la, lb or Ic, each of R2-R6 and R9-R13 is independently selected from H, OH, straight or branched C1-C20-alkoxy groups, straight or branched C1-C20-alkyl groups. ^ EFFECT: obtaining compounds used as antioxidants. ^ 14 cl, 9 ex, 3 tbl, 1 dwg |
