Anti-tyrosinase activity in the constituents of Arctostaphylos uva-urs
i was examined and 1,2,3,6-tetra-O-galloyl-beta-D-glucose, 1,2,3,4,6-p
enta-O-galloyl-beta-D-glucose, methyl gallate, gallic acid, and hydroq
uinone were isolated as active compounds.