Researchers developed new chemical compounds that can block tyrosinase, an enzyme responsible for producing excessive skin pigment that causes dark spots and discoloration. The most effective compound (6f) works better than kojic acid, a commonly used skin-lightening ingredient, and could lead to safer treatments for hyperpigmentation and related skin conditions. Computer simulations showed that one form of the compound fits better into the enzyme’s active site, making it more effective at preventing melanin production.