Compound for skin whitening and composition for skin

The present invention discloses a compound for skin whitening. The compound comprises a structure represented by a formula (I) or (II) or a cosmetically acceptable salt thereof, wherein the formulas (I) and (II) are as the follows. The present invention further discloses a composition for skin, wherein the composition comprises a pharmaceutically effective amount of the compound for skin whitening, and a pharmaceutically acceptable carrier. Compared with the existing whitening component, the compound of the present invention has more excellent or substantially equivalent activity and safety.