| abstract |
[Problem] To provide a novel skin external preparation having a safety and a novel melanin production inhibitory action. A topical skin preparation containing a polar extract of a compound represented by the following general formula (I) and / or a salt thereof, or a plant of the genus Leguminosae containing the compound. General formula (I) (However, R < 1 > -R < 6 > represents either a hydrogen atom, a hydroxyl group, or an isoprenyl group, and at least 3 represents an isoprenyl group among R < 1 > -R < 6 >.) [Selection figure] None |