Patent ID: 7300646

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 Where each or both R 1 and/or R 2 represents hydrogen (H); linear or branched, saturated or unsaturated C 1 -C 12 alkyl, alkenyl, acyl, or heteroalkyl groups; R 3 represents linear or branched, cyclic or acyclic, saturated or unsaturated C 1 -C 12 alkyl, alkenyl, cycloalkyl, cycloalkenyl, or heteroalkyl group; R 4 represents a hydrogen atom (H); straight or branched, cyclic or acyclic, saturated or unsaturated, containing or not containing a heteroatom C 1 -C 22 alkyl, alkenyl, cycloalkyl, cycloalkenyl, heteroalkyl, aryl, or heteroaryl group; and b. a cosmetically acceptable carrier.