Anti-tyrosinase activity in the constituents of Arctostaphylos uva-ursi was examined and 1, 2, 3, 6-tetra-O-galloyl-β-D-glucose, 1, 2, 3, 4, 6-penta-O-galloyl-β-D-glucose, methyl gallate, gallic acid, and hydroquinone were isolated as active compounds.
