text: Especially, the compound 1 showed strong inhibition (IC50=1.33 microM) against the enzyme << tyrosinase >>, as compared to the standard tyrosinase inhibitors kojic acid (IC50=16.67 microM) and [[ L-mimosine ]] (IC50=3.68 microM), indicating its potential used for the treatment of hyperpigmentation associated with the high production of melanocytes.