(E)-2,3-DPA derivatives 1a-1n and one (Z)-2,3-DPA-derivative 1l' using a Perkin reaction with phenylacetic acid and appropriate substituted benzaldehydes. In our mushroomtyrosinase assay, 1c showed higher tyrosinase inhibitory activity (76.43 ± 3.53%, IC50 = 20.04 ± 1.91 µM) with than the other 2,3-DPA derivatives or kojic acid (21.56 ± 2.93%, IC50 = 30.64 ± 1.27 μM). Our mushroomtyrosinase inhibitory