Patent ID: 7524485

Claim:
A cosmetic method of skin lightening comprising applying to the skin a composition comprising: a. about 0.000001 to about 50% of a compound of general formula I Wherein each A 1 and/or A 2 independently is =H, COR, CO 2 R, CONHR where R=C 1 -C 18 saturated or unsaturated hydrocarbon; and each Y 1 and/or Y 2 independently is H, C 1 -C 18 saturated or unsaturated hydrocarbon, or OZ where Z=H, COR 1 , CO 2 R 1 , CONHR 1 and wherein R 1 =C 1 -C 18 saturated or unsaturated hydrocarbon; X is Carbon, Nitrogen, Sulfur, or Oxygen; and N is in integer between 0 and 2. and b. a cosmetically acceptable carrier.