Tyrosinase-IN-2 (compound 67) is a potent inhibitor of tyrosinase, a copper-containing metalloenzyme crucial for the rate-limiting step in melanin biosynthesis and enzymatic browning processes.

EHT 1610 (EHT 5372) is a potent inhibitor of DYRK, with an IC50 of 0.36 nM and 0.59 nM for DYRK1A and DYRK1B, respectively.

Oxyresveratrol 2-O-β-D-glucopyranoside is a phenolic compound isolated from Morus nigra root and is an effective tyrosinase inhibitor with an IC50 of 29.75 μM.