abstract |
A novel tyrosinase inhibitory activator and a whitening composition containing the inhibitor are provided. A tyrosinase inhibitor containing echinacoside represented by the following formula as an active ingredient, and a whitening composition containing the inhibitor. (In the formula, R1 = H, R2 = α-L-Rhamnopyranose, R3 = trans-Caffeoyl, R4 = β-D-Glucopyranose, R5 = OH) The above ecoquinacoside can be obtained by extracting from a clover family. it can. The whitening composition can be widely used as pharmaceuticals, external preparations for skin, foods and drinks, and feed for mammals. [Selection figure] None |